Man I really do appreciate you Khan and your whole idea. You just saved a lot of people from inflexible teachers that refuse to be like water when teaching and stay to their way of teaching.
The phrase I was taught to remember which sides to use for each was "Oh Heaven Another Hour Of Algebra" and you take the first letter of each of those words. O stands for opposite, A is for adjacent and H stands for hypotenuse. And I remembered which was for Sin, Cos, and Tan because my teacher constantly repeated it. Putting this here in case anyone got confused with the soh cah toa method.
Im a senior in HS taking Trig and probably already failing (3rd week of school).. My teacher is new and he's garbage, quite frankly. We've had 5 students already drop the class and I was considering being the 6th. Not anymore. KA saves lives (and grades).
I'm 28 and I never had trig or calculus in my life. These cos and sin things were like the scariest things I ever encountered in real life. I'd type cos into a calculator and holy god what is this number? Now I learn this is all there is to it (i mean, I'm sure there's more to do with it, but it's just triangles). Oh man, I can't believe I was so scared of this stuff.
You had shitty teachers. This guy is even throwing it out there quite fast for a lot of us. This stuff clicks nicely in his mind but lots of us just can grasp it that fast. This was a great tutorial however, in my opinion. But don't feel too bad.. In my world I'm sure he would struggle with great difficulty.
If schools teach it at a low grade, they are completely wasting the students' times, becouse probably most of them will forget and will have, in the future, to relearn almost everything. It's not a dificult subject, but needs memorization and knowledge of real life examples to remind us
Gaming Joker For a lot of things! Unless if you're in retail, you will always need Geometry, Trigonometry, Algebra, Physics, and Calculus. Education is extremely important in modern times. I assume you're in high school; you will discover the importance of education and why you must have it. If you're a small business owner or a manager, then you will need to have an extensive understanding of derivatives to calculate the rate of change in clientele and profit to address the efficiency of fabrication of your product or delivery of service. Hopefully you understand my reasoning.
Gaming Joker i think if you get these numbers if you carefully mutiply them by the sides in our ratio you can get the other side of the ratio. And from sin you get y, cos gives you the x value btw.
I'm an up and forth coming architecture student and Trigonometry, I was never good at it, but thanks to this tutorial I may just be able to pull off an A- at the least. Aiming for all "A"s on all of my subjects, wish me luck.
I think we should have these videos in math class and have supplementary tutors. I'd be dead in my math classes if it weren't for Sal. His techniques and methodologies should be the set standards and requisites for educators in every classroom.
this really helped me. i have my finals for math tomorrow and trig is the only thing i didn't understand because i missed the whole unit on it, without being explained what it is properly. this saved my life because im good at math, but not watching this would bring my grade down by a letter
You have a wonderful dad.. He knows whats ahead in school, and these vids will certainly help you beyond measure. I wish I had a dad that cared that much. Trust me on this.. Do it.. Dont think..just do this..youll be so SO Glad u did..OMG please trust me.
Happened to land this course. It was a good refreshing course. I'd like to add that it would be more remembering if sin/cos/tag goes with a visual way (S of sine streaches over the opposite starting from the hypotenuse, C of cosine starts from the hypotenuse and moves to the adjacent , T of tangent starts from the adjacent and moves up to the opponent). Hope this works.
a Q to the genies reviewers: at 11:52, the two equations (tan 30° vs. tan 60°) at the bottom should have reciprocal results, but they don't if only one result but not both is modified by multiplying sqrt(3)/sqrt(3), i.e. sqrt(3)/3 is NOT the reciprocal of sqrt(3)!
I am currently in grade 8, I have been learning about Quardratic Functions and Logarithms since grade 6. I am currently learning about Trignometry, and I knew the baics (sin, cos, and tan) since grade 4 and 5. I was getting a little confused about how the whole Trigonometry subject. Since I didn't go back to the subject for a while. This is the first video I watched from Khan Academy. It only took me about 5 minutes to understand since it was so clear! I now know the Basics of Trigonometry. I know I should of learned the basics a long time ago. You have made my day so much better, thank you :D. I will make sure to subscribe and like the video.
I'm actually here to figure out if these videos are really as good as people say they are. Well, one way to find out. Pick a complicated subject you know nothing about and see if you can master it. Well, I finally know what those buttons on the calculator mean. Way better than my physics teacher could explain it.
what took my teacher 1 and a half hr to teach, you taught me in 21 minutes all together, and i actually understood it all and I'm just a sophomore in high school :D
wow..... Thanks man I'm in 8th grade studying in sg we are wayyyyyyy ahead of this in school, but life saver cus my smo prep classes are starting and this helped
this helped me out a lot. before watching this video, the only part of triganometry i knew was soh cah toa, but now i understand how to use soh cah toa. Thank you so much.
we learnt this short cut some people have (sin=p/h) curly black hair (cos=b/h)through proper brushing ( tan=p/b), I think this is easy to remember also.
I can never find the next one. Even though I have Autoplay on, it moves to something else and not the next lesson (something completely different). So frustrating!
Instead of showing the hypotenuse as a square root number wouldn’t it just make more sense to get the result from square rooting it so you don’t have to rationalise the number?
Thank you soooo much. I took Trigonometry in high school and got a B but don"t remember anything. THese tutorials were very helpful bc I plan on taking PreCalculus to Calculus III. THanks a lot.
i feel : Old Harry(opposite/hypotenuses=sin) And His(adjacent/hypotenuse=cos) Old Aunt(opposite/adjacent=tan) is better that 'soh cah toa'; Your videos are amazing and are very interesting than our regular classrooms
I have an exam tomorrow and I understand all this but when I try to solve anything I mostly mess up =/ I even used these (sin, cos and tan) in physics last year and I did well... Khan Academy to the rescue!
For the square root of 65 one, could you just raise the top and bottom by the second power to get rid of the square root? If so, you'd end up with 4 over 65.
I have got this question for homework and i have no clue how to work it out.Help please :( The great pyramid of Giza is 146m high.Two people A and B are looking at the top of the pyramid.The angle of elevation of the top of the pyramid from B is 12degrees. The distance between A and B us 25m,If A abd B are 1.8m tall calculate: a)the distance from B to the centre of the base of pyramid. b)the angle of elavation of the top of pyramid from A C)the distance between A and the top of pyramid
Extraterrestrial Music The right angle cannot be theta because in a right angled triangle, theta is one of the other two angles, if theta was also right angled, you wont even have a triangle. Try drawing it for proof. But make sure you remember sin90 is 1 and cos90 is 0.
Because 65 isn't a perfect square, so you'd have to divide it into two numbers, one a perfect square but neither of the two numbers that multiply into 65 are perfect squares and they're prime, so you can't simplify it any further.
Gi But when I put 65 into the calculator and hit the square root button I get: 8.06 so can I use that number instead? I find leaving it as a square root with the symbol confusing!
Man I really do appreciate you Khan and your whole idea. You just saved a lot of people from inflexible teachers that refuse to be like water when teaching and stay to their way of teaching.
True.
Also i did maths in another language..
The phrase I was taught to remember which sides to use for each was "Oh Heaven Another Hour Of Algebra" and you take the first letter of each of those words. O stands for opposite, A is for adjacent and H stands for hypotenuse. And I remembered which was for Sin, Cos, and Tan because my teacher constantly repeated it. Putting this here in case anyone got confused with the soh cah toa method.
I like it🥰
Lmaooo
5:59 "Let's make it a little bit 'Khan-crete'."
Subtittles lie
Ooooo
colors is the key - to teach. I practically didn't loose my attention at all, because he uses colors
Ok, "Taurius Litvinavicius"
Same
Funny you mention (seven years ago!) the colors give some really good insight that wouldn't be there otherwise. Relationships
true, true...i still lost ALL of my attention tho 💀
Im a senior in HS taking Trig and probably already failing (3rd week of school).. My teacher is new and he's garbage, quite frankly. We've had 5 students already drop the class and I was considering being the 6th.
Not anymore. KA saves lives (and grades).
+Joshua Stevenson close one there, i can barely skim out of secondary at the rate I'm going, this stuff is my comeback
How did it go?
A PIECE OF CAKE C: meh.....exams are a week away
john daymond-king hope you will do well ;)
A PIECE OF CAKE C: yea
I'm 28 and I never had trig or calculus in my life. These cos and sin things were like the scariest things I ever encountered in real life. I'd type cos into a calculator and holy god what is this number?
Now I learn this is all there is to it (i mean, I'm sure there's more to do with it, but it's just triangles). Oh man, I can't believe I was so scared of this stuff.
***** trig is yr 8 (second year of MS for you americans) math at my school
***** They taught it to us in middle school.
You had shitty teachers. This guy is even throwing it out there quite fast for a lot of us. This stuff clicks nicely in his mind but lots of us just can grasp it that fast. This was a great tutorial however, in my opinion. But don't feel too bad.. In my world I'm sure he would struggle with great difficulty.
Ryan N
If schools teach it at a low grade, they are completely wasting the students' times, becouse probably most of them will forget and will have, in the future, to relearn almost everything. It's not a dificult subject, but needs memorization and knowledge of real life examples to remind us
Learned this faster in a 12 minute video than an hour & a half class. And why do we need this btw?
Gaming Joker For a lot of things!
Unless if you're in retail, you will always need Geometry, Trigonometry, Algebra, Physics, and Calculus. Education is extremely important in modern times.
I assume you're in high school; you will discover the importance of education and why you must have it.
If you're a small business owner or a manager, then you will need to have an extensive understanding of derivatives to calculate the rate of change in clientele and profit to address the efficiency of fabrication of your product or delivery of service.
Hopefully you understand my reasoning.
trig is heavily used in navigating and maps. If you ever wanna learn Rocket Science trig and calculus are like gods to you.
MBLBOSS using fancy words to look smart since 1994
Gaming Joker i think if you get these numbers if you carefully mutiply them by the sides in our ratio you can get the other side of the ratio. And from sin you get y, cos gives you the x value btw.
@@brandonfleming7118 xD 2 year old comments can still make me laugh
I'm an up and forth coming architecture student and Trigonometry, I was never good at it, but thanks to this tutorial I may just be able to pull off an A- at the least.
Aiming for all "A"s on all of my subjects, wish me luck.
good luck😊😊😊
lock good
did you do it bro
Mike Literous hi
Did u achieve it ?
I think we should have these videos in math class and have supplementary tutors. I'd be dead in my math classes if it weren't for Sal. His techniques and methodologies should be the set standards and requisites for educators in every classroom.
OMG YOU ARE MY LIFESAVER THANK YOU THANK YOU! my math teacher just can't explain it well but i get this thank you so much!!
I'm so happy you are "re-doing" your older videos with your nice new writing skills! Would you consider teaching us about General Relativity?
“SOH CAH TOA”
the enthusiasm 😂
this really helped me. i have my finals for math tomorrow and trig is the only thing i didn't understand because i missed the whole unit on it, without being explained what it is properly. this saved my life because im good at math, but not watching this would bring my grade down by a letter
I m from Delhi (India) Indian maths is very highly appreciate in the world.
Obviously your english isn't.
MARK CHAN racist
christopher porras Oh I'm sorry that you were offended. Do you need any condolences?
just kidding bro :D Peace yow
MARK CHAN Lol Mark CHAN, Jackie Chan POW
Learned more in a 12 minute video than a 2hour lecture! Understood everything clearly thankyouuu
I remember soh cah toa by "some old hippy, caught another hippy, token on acid."
Same to me
What
where did u go to school buddy?!?!
@@aredherrera151 The streets taught me everything I know. 🤣
@@mcbride967 hahaha, can't believe you responded to a 6-year-old comment of yours
Thank you so much. !! I am watching this after 11 years !! It’s so helpful
You have a wonderful dad.. He knows whats ahead in school, and these vids will certainly help you beyond measure. I wish I had a dad that cared that much. Trust me on this.. Do it.. Dont think..just do this..youll be so SO Glad u did..OMG please trust me.
Happened to land this course. It was a good refreshing course. I'd like to add that it would be more remembering if sin/cos/tag goes with a visual way (S of sine streaches over the opposite starting from the hypotenuse, C of cosine starts from the hypotenuse and moves to the adjacent , T of tangent starts from the adjacent and moves up to the opponent). Hope this works.
"Let's do a ton of examples"
inspiration of the day..
Thank you so much, teacher :)
a Q to the genies reviewers: at 11:52, the two equations (tan 30° vs. tan 60°) at the bottom should have reciprocal results, but they don't if only one result but not both is modified by multiplying sqrt(3)/sqrt(3), i.e. sqrt(3)/3 is NOT the reciprocal of sqrt(3)!
After 20 years I finally understood that, Thanks:-).
Thank you so much sir I am 'soh cah toa' to you will recommend your channel to all my friends
I am currently in grade 8, I have been learning about Quardratic Functions and Logarithms since grade 6. I am currently learning about Trignometry, and I knew the baics (sin, cos, and tan) since grade 4 and 5. I was getting a little confused about how the whole Trigonometry subject. Since I didn't go back to the subject for a while.
This is the first video I watched from Khan Academy. It only took me about 5 minutes to understand since it was so clear! I now know the Basics of Trigonometry. I know I should of learned the basics a long time ago. You have made my day so much better, thank you :D. I will make sure to subscribe and like the video.
you chinese?
I have an employment aptitude test Saturday... I had trig 25 years ago. THANK YOU for the refresher!
1-Start with the basics. It comes back :)
I'm actually here to figure out if these videos are really as good as people say they are. Well, one way to find out. Pick a complicated subject you know nothing about and see if you can master it. Well, I finally know what those buttons on the calculator mean. Way better than my physics teacher could explain it.
this is so much easier than the chart my teacher told me to remember of all the values!
sal, you probably saved my *** for my quiz tomorrow
Good job explaining Mr. Sal Khan Sir!
what took my teacher 1 and a half hr to teach, you taught me in 21 minutes all together, and i actually understood it all and I'm just a sophomore in high school :D
Thank You so much it helped me a lot ♥️
I love it how he repeats himself constantly.... but i hate it that he repeats himself constantly...
any one else about to fail the hell out of your geometry final
I. Watching this 3 years earlier before my final so I'm not going to die
This is easy to understand, no one should fail.
Four years before my final.
Ranier Truesdale I’m about to take a college entrance exam and I will surely fail. If I don’t, I’ll update.
Hello Bangsie So did you take it yet?
man’s saving my life
wow..... Thanks man I'm in 8th grade studying in sg we are wayyyyyyy ahead of this in school, but life saver cus my smo prep classes are starting and this helped
YOU WATCH MHA?
Thank you so much for making this amazing and helpful video Kahn Academy!
this helped me out a lot. before watching this video, the only part of triganometry i knew was soh cah toa, but now i understand how to use soh cah toa. Thank you so much.
we learnt this short cut some people have (sin=p/h) curly black hair (cos=b/h)through proper brushing ( tan=p/b), I think this is easy to remember also.
I can never find the next one. Even though I have Autoplay on, it moves to something else and not the next lesson (something completely different). So frustrating!
Thanks again, saves my time from reading an old book containing 500 pages, thanks a lot...
I am humble seriously.Nobody explains it better than Khan.
BAM!! You are awesome! In 15 min you showed me what my teacher was trying to for like a month of classes.
they should just get these videos in maths class instead of employing teachers
Instead of showing the hypotenuse as a square root number wouldn’t it just make more sense to get the result from square rooting it so you don’t have to rationalise the number?
Deserves more likes
Thank you soooo much. I took Trigonometry in high school and got a B but don"t remember anything. THese tutorials were very helpful bc I plan on taking PreCalculus to Calculus III. THanks a lot.
khan academy the goat for when you have a math test and you dont know how to study for it
- In ∆XYZ measure of angle Y is 90o . If sinX = 4/5, and XY = 6cm, then what is the length (in cm) of side YZ?
khanacademy is amazing! Khan has no idea how many lives hes changing!
10:30 It says sin is opposite over adjacent even though it is opposite over hypotenuse. (301st comment)
Nevermind, he corrected himself :)
i feel : Old Harry(opposite/hypotenuses=sin) And His(adjacent/hypotenuse=cos) Old Aunt(opposite/adjacent=tan) is better that 'soh cah toa';
Your videos are amazing and are very interesting than our regular classrooms
Random Master soh cah toa is better
ooh yes soh cah toa in my mind Thank you so much teacher🎉🎉🎉
I have an exam tomorrow and I understand all this but when I try to solve anything I mostly mess up =/ I even used these (sin, cos and tan) in physics last year and I did well...
Khan Academy to the rescue!
Thank you for making studying Math fun for us!
I'm german and I fkin understand it :D
Thank you :) You saved my life... And these aren't just words :D
Really nice explanation made it easy as abc with SOH CAH TOA !
i love you. thank you so much. your better than my math teacher.
Omfg! I didn't know that this would be this easy! Thanks
THANK YOU!!! YOU ARE THE BEST KHAN ACADEMY!!
This man is a life saver. Thank you for making this video, you really helped me.
This is just khan-tastic!!!😎
Awesome sal. U set the standard for education
Its about the ratios and relationship between the 3 angles.
Thank you! So much.....!
With love from India !
For the square root of 65 one, could you just raise the top and bottom by the second power to get rid of the square root? If so, you'd end up with 4 over 65.
no because then you would end up with 16 over which does not equal 4 over the square root of 65
Yes Im finally getting this, My freaking teacher goes way to fast for me and other classmates. With this I'll be able to catch up a bit.
u r de best!!!! helped me alot
Math is so fun once you figure out how to implement it into real life!
I learn more from Khan than at school.
man you are great! i wish i could pay so much attention to boring teacher
i love the way he says soh cah toa like hakuna matata
sometimes
You are doing great job !!!! .
I have to retake the trig regents tomorrow
Thank god I have this playlist
Im an 8th grader just started. Im here because I want to learn something new. It may be high school math but its easy
+Son Goku Who?
Man, I forgot how repetitive high school math was... TY for the brush up tho
i am very impressed from this lecture thanks
I'm in primary but I love trigonometry
Watching this stuff for PreCal(May it die and be damned in hell)> Oh sweet I see a playlist, better watch the 39 videos while I am at home and sick.
Definitely just helped me fix my homework.
HA - h is on bottom, Then A (adjacent) for Tan
I have got this question for homework and i have no clue how to work it out.Help please :(
The great pyramid of Giza is 146m high.Two people A and B are looking at the top of the pyramid.The angle of elevation of the top of the pyramid from B is 12degrees. The distance between A and B us 25m,If A abd B are 1.8m tall calculate:
a)the distance from B to the centre of the base of pyramid.
b)the angle of elavation of the top of pyramid from A
C)the distance between A and the top of pyramid
I heard “fuc” at 7:43............ the video is amazing!!! like alaways
This helped me for physics
arigato sensei
sooo helpful! i think I'm finally ready for finals tommorrow....
you have helped another person .
thank you :)
This is really easy! Thanks for the demo!
V good Khan academy . proud
use √65 since it is exact. 8.06 is too narrow of an answer, since it is rounded off.
This helped me so much! Thank you
Thanks for the video. ...
this help a lot
Someone please answer, how do we find the trig functions of the right angle in the triangle. (If the right angle were theta for instance)???
Extraterrestrial Music The right angle cannot be theta because in a right angled triangle, theta is one of the other two angles, if theta was also right angled, you wont even have a triangle. Try drawing it for proof. But make sure you remember sin90 is 1 and cos90 is 0.
@@SAsquirtle thank you
It shows something about his character that he's doing all of this for knowledge for it's own sake.
Way more better than my school teacher
Nice! so neat and well explained
Very useful!!!
Why wouldn't you just use a calculator on the square root of 65??
Because 65 isn't a perfect square, so you'd have to divide it into two numbers, one a perfect square but neither of the two numbers that multiply into 65 are perfect squares and they're prime, so you can't simplify it any further.
Gi But when I put 65 into the calculator and hit the square root button I get: 8.06 so can I use that number instead? I find leaving it as a square root with the symbol confusing!
Unless it's a whole number, you don't simplify it any more.
cause it becomes like 8.32345678909811234 or somethin'
I'm not exactly sure what you're referring to, but make sure you're using soh cah toa where sine=opposite/hypotenuse.
I know trigonometry now XD
Now i can think clearly.dem square roots are distractors are things your suppost to multiply ?....Turn up!