Law of Cosines, Finding Angles & Sides, SSS & SAS Triangles - Trigonometry

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  • เผยแพร่เมื่อ 4 ธ.ค. 2024

ความคิดเห็น • 501

  • @TheOrganicChemistryTutor
    @TheOrganicChemistryTutor  ปีที่แล้ว +31

    Trigonometry - Free Formula Sheet: bit.ly/47diggI
    Final Exams and Video Playlists: www.video-tutor.net/
    Trigonometry Final Exam Review: th-cam.com/video/OAsbx4TEnL0/w-d-xo.html
    Next Video: th-cam.com/video/aSdaT62ndYE/w-d-xo.html

    • @robsonrobinzo-ow7em
      @robsonrobinzo-ow7em ปีที่แล้ว +1

      when I see organic I don't hesitate to click then everything goes as expected always

  • @502Bentley
    @502Bentley 4 ปีที่แล้ว +1581

    With classes now online, you are basically my teacher now..

    • @yasshi4796
      @yasshi4796 4 ปีที่แล้ว +14

      Same

    • @riseruchan3616
      @riseruchan3616 4 ปีที่แล้ว +29

      Relatable, our prof doesn't teach us a thing. Smh.

    • @blackholedividedbyzero
      @blackholedividedbyzero 3 ปีที่แล้ว +8

      His everybody's teacher

    • @jhfdoggy8788
      @jhfdoggy8788 3 ปีที่แล้ว +20

      I find it so extremely Erie that this comment now says 1 year ago.

    • @mq-r3apz291
      @mq-r3apz291 2 ปีที่แล้ว +3

      how did he convert to degrees? I know how to convert with pi/180 to radians but got something different. At what part did he convert?

  • @Yellowbrick559
    @Yellowbrick559 4 ปีที่แล้ว +384

    There are a ton of math tutorial videos on TH-cam, but there is something about the way you explain things and the calming presence of your voice that makes it so much easier to understand. I always watch multiple videos on the same subject only to find yours and things finally click. Thanks so much for what you do!

  • @Nadia-hj6tc
    @Nadia-hj6tc 4 ปีที่แล้ว +246

    the only youtube channel that actually helps me with math. bless u sir

  • @ralphcesaryabut6668
    @ralphcesaryabut6668 5 ปีที่แล้ว +590

    Not all heroes wear capes. I owe you my entire semester.

  • @zah1377
    @zah1377 5 ปีที่แล้ว +128

    You is a gift from God, You are a blessing,, and I want to say Thank you very much. You make everything that seemed hard at first easy. Thank you and God bless you.

    • @TheOrganicChemistryTutor
      @TheOrganicChemistryTutor  5 ปีที่แล้ว +70

      You're welcome

    • @focusonme7616
      @focusonme7616 9 หลายเดือนก่อน +8

      ​​@@TheOrganicChemistryTutorCan you be my husband sir

    • @lord-draco
      @lord-draco 8 หลายเดือนก่อน

      Seriously nhgal ​@@focusonme7616

    • @Troll_Editz69420
      @Troll_Editz69420 4 หลายเดือนก่อน +1

      💀💀💀

  • @GP-ed2ch
    @GP-ed2ch 2 ปีที่แล้ว +71

    idk why you teach me more than a 90 minute lecture man. Thank you so much

  • @Ka1sserrr
    @Ka1sserrr 8 หลายเดือนก่อน +3

    Without you I wouldn’t be able to maintain an A in my class I am eternally grateful

  • @lincolnscott1877
    @lincolnscott1877 2 ปีที่แล้ว +16

    Thank you so much, Organic Chemistry Tutor! You're so helpful to many and many of us wouldn't understand these lessons without you

  • @Fawaffles
    @Fawaffles 4 ปีที่แล้ว +16

    The way his teaching and his calm voice make me never stress when studying while watching this dude

    • @Misty-nd8xm
      @Misty-nd8xm 3 ปีที่แล้ว +3

      I agree my guy :)

  • @akari2178
    @akari2178 ปีที่แล้ว +8

    I take my GED this year, your videos are really helping me out! Thank you so so much! Your explinations are so clear and really helpful! God bless you sir :)

  • @romantitus3341
    @romantitus3341 ปีที่แล้ว +4

    As usual, I learn more about law of cosines in this video then a teacher that taught this for 2 weeks and I had no idea until I saw this.

  • @pear2369
    @pear2369 4 ปีที่แล้ว +182

    When your math teacher uses the easiest problems for examples, you don’t learn much..

    • @planecrazy3808
      @planecrazy3808 4 ปีที่แล้ว +33

      Boi I dont know how I am learning more here than in class.

    • @reality4saints
      @reality4saints 3 ปีที่แล้ว +9

      This is literally my teacher and I wanna smack the shit outta her

    • @Nsut_Aim
      @Nsut_Aim 8 หลายเดือนก่อน +8

      It's just illustration
      To show how the formula or general result works
      The part of problem solving is upon you

  • @awarnick84
    @awarnick84 3 ปีที่แล้ว +48

    Thank you for doing these. Your explanations are SO clear and concise.

  • @georgesadler7830
    @georgesadler7830 3 ปีที่แล้ว +6

    MR. Organic Chemistry Tutor, thank you for another awesome video on The Law of Cosines. This is the backbone of Trigonometry.

  • @sigrid.5994
    @sigrid.5994 5 ปีที่แล้ว +59

    Just got a 94 in my Trigonometry class because of you ❤

    • @DEWHighlights
      @DEWHighlights 6 หลายเดือนก่อน +6

      Bruh I still got a D+ on my quiz. Man, math isn’t for me😢

  • @phyllismurphy6540
    @phyllismurphy6540 4 ปีที่แล้ว +6

    He is the best. I always go to him first. So patient and kind. I sure would like to see his face.

  • @bellelirazan5970
    @bellelirazan5970 2 ปีที่แล้ว +7

    Thank you so much for this, I was very confused when this was first discussed to us, now I fully understand the lesson. Please continue to upload more videos, you saved us all - an online class student

  • @MrSiya-k6c
    @MrSiya-k6c 6 หลายเดือนก่อน +8

    You know ,i listened to my teachers for many years to understand those methods You did better in 10mins
    You're the 21s legend brother

  • @Gabs_Mex
    @Gabs_Mex 8 หลายเดือนก่อน +1

    3 years later, helping me pass my demonstration of learning 🙏🏼🙏🏼🙇🏼‍♀️

  • @krattgirl124samarama4
    @krattgirl124samarama4 4 ปีที่แล้ว +5

    I have my ACT coming up in a few days so this video really helped me with things I forgot

  • @sabrinaaviloria
    @sabrinaaviloria 4 ปีที่แล้ว +4

    My math teacher hasn’t taught us anything the whole quarantine, you just saved me sir thank you:)

  • @nikolai4380
    @nikolai4380 2 ปีที่แล้ว +6

    there is a better formula for SSS, like cos C= a2+b2-c2 /2 x a x b, cosA= b2+c2-a2 / 2 x a x b, cosB= a2+c2-b2 / 2 x a x c

  • @AbdouKarimJarra-t6q
    @AbdouKarimJarra-t6q 9 หลายเดือนก่อน +1

    I swear to god you’re the best mathematician I’ve been watching your videos since and I can now boldly say that I’m not afraid to solve maths questions because your explanations is top notch ❤

  • @jananiu6430
    @jananiu6430 5 ปีที่แล้ว +175

    my ninth grade ass skipped classes so i really needed this lmao

    • @benben-ro1cr
      @benben-ro1cr 4 ปีที่แล้ว

      where are you from lol?

    • @lilyscott9902
      @lilyscott9902 4 ปีที่แล้ว

      Jana Niu feel this

    • @d0d0birdiexd78
      @d0d0birdiexd78 4 ปีที่แล้ว +29

      Jesus 9th grade? Im doing this in 11th grade!

    • @jananiu6430
      @jananiu6430 4 ปีที่แล้ว +4

      @@benben-ro1cr Philippines

    • @jananiu6430
      @jananiu6430 4 ปีที่แล้ว +6

      @@d0d0birdiexd78 Damn really? learned this in grade 9 and 10

  • @billcipher5508
    @billcipher5508 2 ปีที่แล้ว +3

    THANK YOU!! Very clear, and a relaxing voice!! I used this for one of my math problems because I didn’t understand how to use the formula at all!! Turns out, I didn’t need to do that problem but now I know how to use the formula and I have a test in two days so 🤷‍♀ sweet ig lol

  • @oyingiwahouse_of_majestic254
    @oyingiwahouse_of_majestic254 3 ปีที่แล้ว +4

    Wow you solve questions so easy, I rent to understand perfectly when even I watch your videos.

  • @JanePlayz
    @JanePlayz 7 หลายเดือนก่อน +1

    I literally have 1 night to cram this and you're saving me

  • @espinarusseljohnc.8022
    @espinarusseljohnc.8022 3 ปีที่แล้ว +3

    You've helped me a lot I passed my subject in calculus1 coz of you thank you!

  • @AhmadMaher-u6k
    @AhmadMaher-u6k 7 หลายเดือนก่อน +429

    I hate math

    • @amiralihamidian6762
      @amiralihamidian6762 6 หลายเดือนก่อน +9

      Ur not alone

    • @ondniwa
      @ondniwa 6 หลายเดือนก่อน +16

      i used to be, you won’t be hating it as much after you learn more of it

    • @AbdulrahmanAyman-og7tf
      @AbdulrahmanAyman-og7tf 6 หลายเดือนก่อน +6

      I’m the opposite of you

    • @user-ir4wn6qs5t
      @user-ir4wn6qs5t 6 หลายเดือนก่อน +26

      @@AbdulrahmanAyman-og7tfi disliked your comment

    • @Findgod222
      @Findgod222 6 หลายเดือนก่อน +9

      Who doesn’t. I have to relearn all this sht for my final. This sucks ass. I hope I don’t have to do math ever again after I graduate.

  • @agnieszkaelainegarcia2580
    @agnieszkaelainegarcia2580 2 ปีที่แล้ว +4

    thank you so much, you help so many students

  • @Visichy
    @Visichy 2 ปีที่แล้ว

    I've got a math test tomorrow and you just helped me understand all of this so much better than my teacher thank you

  • @abbster515
    @abbster515 20 วันที่ผ่านมา

    I had to leave my math class early today, so I missed the lesson, and this video (along with the one about Law of Sines) is SO helplful!!!!

  • @bernstein9476
    @bernstein9476 7 หลายเดือนก่อน +2

    Yo bro ts came out 6 years ago and im still using ts I love u sm thank you

    • @Babyselina-ww2ru
      @Babyselina-ww2ru 5 หลายเดือนก่อน

      What sm mean?

    • @abbster515
      @abbster515 20 วันที่ผ่านมา

      @@Babyselina-ww2ru it means ‘so much’

    • @Babyselina-ww2ru
      @Babyselina-ww2ru 16 วันที่ผ่านมา

      @@abbster515 thanks

  • @gibsontamu-s7k
    @gibsontamu-s7k 4 หลายเดือนก่อน

    bro your videos are the best, you helped me in so many of my exams. please don't stop uploading.

  • @YourOwnAdventure
    @YourOwnAdventure ปีที่แล้ว +1

    I'm not sure if you do it on purpose, but I enjoy it when you call incorrect laws, angles, etc. to keep us sharp!

  • @shinshin744
    @shinshin744 9 หลายเดือนก่อน

    as a struggling grade 8, this helped me alot since i couldnt even answer any of the math questions when its trigonometry class since i was always absent on mondays thank you so much

  • @PureLuck21
    @PureLuck21 5 ปีที่แล้ว +4

    first ever video on youtube that actually helps

  • @radenfearless
    @radenfearless ปีที่แล้ว +1

    This is simply a brilliant help in systematic preparation🤗

  • @focusonme7616
    @focusonme7616 9 หลายเดือนก่อน

    You're the reason why I was able to pass my 3 major during my first sem,Thank you!!!!!!!!!!!!!!!

  • @shawnlytle266
    @shawnlytle266 7 หลายเดือนก่อน

    Thank you for this video. Very helpful because I had to miss a class this week and this easily summed up the information that I had missed.

  • @christophernguyen8083
    @christophernguyen8083 3 ปีที่แล้ว +3

    Thank you for this I'm sure I know how to do this, but it's been a while since I've done math. I am currently in engineering by the way.

  • @michaelnwoye2103
    @michaelnwoye2103 2 ปีที่แล้ว +3

    You are a nice tutor
    Your videos have helped me alot even when I’m preparing for exams
    You take your time to go into details and your explanations makes me understand what i want to know
    Thank you so much

  • @psychopathic3082
    @psychopathic3082 ปีที่แล้ว

    This vid has clear objective and has more detail and easy to follow up with his every equation than my online classes! Online class are boring! Wasting our 10 mins for one example and this vid is only few minutes LOL 😂

  • @free_Sdot
    @free_Sdot ปีที่แล้ว +1

    Better than my math teacher

  • @izyansyed2817
    @izyansyed2817 3 ปีที่แล้ว +1

    4:04 angle c is 60 not 30
    btw This really helped me for my test tomorrow

  • @jada9360
    @jada9360 3 ปีที่แล้ว

    The best thing is that you slove some example sums. That really helps

  • @AbdouKarimJarra-t6q
    @AbdouKarimJarra-t6q 9 หลายเดือนก่อน

    Your videos helped me a lot and I’ve shared your channel to my friends too so that they can benefit from your videos

  • @andrewmorrissy3122
    @andrewmorrissy3122 2 ปีที่แล้ว

    Organic chemistry tutor clutching again for my statics exam bless up ❤️

  • @nanafisiiahi
    @nanafisiiahi ปีที่แล้ว

    Thanks for helping me pass Geometry! Real one fr‼️

  • @iane.2155
    @iane.2155 ปีที่แล้ว

    Good luck for my exam tommorow. Thanks OrgChemTeach!

  • @froppy9086
    @froppy9086 3 ปีที่แล้ว +1

    u saved my final test thank you ;-;

  • @orangejuice8339
    @orangejuice8339 4 ปีที่แล้ว +3

    9:05
    Isn’t angel A= 180- angel C - angel B which is equal to 180- 73.4 -48.2= 58.4 ?
    Also thank you for your lessons they’re really helpful.

  • @tigershark2772
    @tigershark2772 ปีที่แล้ว

    yes, the videos from 2006 are really helping cause as far as I know, math hasn't really changed and im still passing.

  • @just.a.browser
    @just.a.browser 9 หลายเดือนก่อน

    YAAAGGHHH!! I have been studying and rn i think i have some idea on this topic. i will cm bk and report if i learnt anything from this video!! edit: at first i thought there was a problem but watching ur video, i was able to find a mistake in my workings. Thanks!

  • @FoosResearch
    @FoosResearch 2 ปีที่แล้ว +1

    You've made an error in the sign of the numerator for Cos C about 6:25.

  • @steveturner1680
    @steveturner1680 2 ปีที่แล้ว +3

    Do you use your computer mouse to write? Thank you so much! Our teacher is moving to Maine so it looks like we really need u :/

  • @liamhoward2208
    @liamhoward2208 5 ปีที่แล้ว +21

    7:48 it’s the law of sines not the law of cosines

    • @AubreyLJohnson
      @AubreyLJohnson 4 ปีที่แล้ว +5

      Not really a big deal :/

    • @ケン-k9j
      @ケン-k9j 4 ปีที่แล้ว

      At least he taught us. I have a test tomorrow

  • @dragonninja9908
    @dragonninja9908 ปีที่แล้ว

    Thx bro, rlly saving me from catastrophic failure rn

  • @bhoot._.56
    @bhoot._.56 10 หลายเดือนก่อน +1

    bro taught me more maths than my actual maths teacher

  • @didacemugemana7095
    @didacemugemana7095 ปีที่แล้ว

    thank u for everything these videos improve our understanding may GOD bless u

  • @elliottmaccrone328
    @elliottmaccrone328 ปีที่แล้ว

    this man is a godsent

  • @Xfilesfreak66
    @Xfilesfreak66 3 หลายเดือนก่อน

    Thank you for keeping things short and to the point. My professor was all over the place when teaching this and skipped around making it really difficult to follow. Now it makes perfect sense to me and you're a life saver!

  • @ronnahzulu4506
    @ronnahzulu4506 2 ปีที่แล้ว

    God bless you ❤️❤️😩 I never knew trig can be this easy ❤️❤️❤️

  • @heyman6087
    @heyman6087 ปีที่แล้ว

    You help me so much in the times I need it

  • @megaminakahara1547
    @megaminakahara1547 6 ปีที่แล้ว +1

    The answer from the SSS which is sin 73.40 is 0.958323 convert to 4 decimal 0.9583

  • @nielsdaemen
    @nielsdaemen 3 ปีที่แล้ว +3

    7:48 **Law of sine's!*

  • @evloghmenosxxx4035
    @evloghmenosxxx4035 4 ปีที่แล้ว

    Thanks , some better than my maths teacher

  • @HalaZaki-l5k
    @HalaZaki-l5k 3 หลายเดือนก่อน

    Thanks for explaining nicely.would you please explain bearing

  • @crichellerevilla7552
    @crichellerevilla7552 2 ปีที่แล้ว

    Thank you for saving my struggles😊😊☺️

  • @CakepopSims
    @CakepopSims 3 ปีที่แล้ว +3

    where did that -1 come from and how did you get 73 degrees for the angle

  • @vascobishop3359
    @vascobishop3359 ปีที่แล้ว

    Perfect explanation.

  • @jakeghaust5550
    @jakeghaust5550 5 ปีที่แล้ว +1

    Thanks for the help it’s easy now

  • @jhynx2081
    @jhynx2081 3 ปีที่แล้ว

    I PASSED!!! THANK YOU SO MUCH I OWE YOU A LOT

    • @conk1
      @conk1 2 ปีที่แล้ว

      W

  • @bgjunebug1
    @bgjunebug1 ปีที่แล้ว

    Thanks!

  • @SarrouTube
    @SarrouTube ปีที่แล้ว +2

    Excellent !!!!

  • @chair4710
    @chair4710 6 หลายเดือนก่อน +1

    Thank you papa

  • @FUNXP12
    @FUNXP12 2 ปีที่แล้ว +1

    Thank you very much

  • @malaika7946
    @malaika7946 13 วันที่ผ่านมา

    I've learned more from his videos than my actual teacher.

  • @shady-et5lu
    @shady-et5lu 3 ปีที่แล้ว +4

    7:46 I think he meant "Now let's use the laws of sine"

    • @ojasjain8372
      @ojasjain8372 3 ปีที่แล้ว +1

      I was checking to see if someone said that

  • @nadeenhameed5808
    @nadeenhameed5808 3 ปีที่แล้ว +2

    I’m a little confused because teacher gave me the formula cos

    • @abbster515
      @abbster515 20 วันที่ผ่านมา

      I’m pretty sure your formula and the video’s formula are equivalent (they end up with the same answer), so you can use either!

  • @lonely-duck
    @lonely-duck ปีที่แล้ว

    you are a grade savior

  • @kina2574
    @kina2574 4 ปีที่แล้ว

    You're a life saver

  • @nizavillanueva6285
    @nizavillanueva6285 2 ปีที่แล้ว

    It is so great !! Best explained

  • @virgiliojose9153
    @virgiliojose9153 2 ปีที่แล้ว +1

    2:55 i don't get where did you get the cosine, i calculated the cosine but the result isn't same as in the video

  • @lucidfangirl1030
    @lucidfangirl1030 3 ปีที่แล้ว +1

    where did the A=130-something come from? At the end?

  • @matto2971
    @matto2971 4 ปีที่แล้ว

    Good explanation. Thank you.

  • @lancejaredcayabyab2719
    @lancejaredcayabyab2719 3 ปีที่แล้ว +1

    thank you, sir! as much as i love learning math, i kinda hate this topic. i always find math amazing when you get to do ways to shortcut things, but this topic needs long solutions. wish me luck :))

    • @halfagony-halfhope
      @halfagony-halfhope 2 ปีที่แล้ว

      You're exactly like me, I love finding my own way out of problems if I can find one xD

  • @alejandragalindo7890
    @alejandragalindo7890 ปีที่แล้ว

    Better that my teacher

  • @H.Maria007
    @H.Maria007 3 ปีที่แล้ว

    you are a genius

  • @elijahsouthern9198
    @elijahsouthern9198 2 ปีที่แล้ว

    When do you know to have your calculator in radian or degree mode?

  • @jul9017
    @jul9017 3 ปีที่แล้ว +3

    how did you get the 1/2?

    • @ronrestaino8182
      @ronrestaino8182 2 ปีที่แล้ว +1

      cos 60 degrees on the unit circle equals 1/2

  • @alpacapunch9238
    @alpacapunch9238 2 ปีที่แล้ว +1

    during the 2nd example how did you know to use the law of cosines for CosC and not CosA or CosB?

    • @xodinaa77
      @xodinaa77 ปีที่แล้ว

      i’m wondering the same thing

  • @brucemyers1121
    @brucemyers1121 ปีที่แล้ว

    Thanks to you, I now know how to do law of cosines properly. I do wonder why when it comes to solving an angle with law of cosines that I have to move the a^2 and b^2 to the other side? Other than that, I understand everything seen here, I just have questions on the "why?" of it.

    • @nomnam7352
      @nomnam7352 ปีที่แล้ว

      The purpose of moving all the variables to the other side of the equation is to isolate the expression (cosC) because C is the measure of the angle you’re trying to find. If the angle is unknown*

  • @tycreate1984
    @tycreate1984 5 ปีที่แล้ว +1

    4:32 should the triangle technically not exist since more positive 1

  • @Tapintherap7238
    @Tapintherap7238 4 ปีที่แล้ว

    This is easy thanks,so this applies to everything in the law of cosine right or is there something else we need to learn ?

  • @nyamejonathan1228
    @nyamejonathan1228 2 ปีที่แล้ว

    Nice lessons bro...

  • @uglynaija
    @uglynaija 5 ปีที่แล้ว +13

    Gotta geometry test today this funna be a breeze🙅‍♀️

    • @Gavenchyy
      @Gavenchyy 5 ปีที่แล้ว +1

      Rewind i got a precalc test tmr 😩

    • @Allen-zq4lp
      @Allen-zq4lp 5 ปีที่แล้ว +1

      This is trigonometry btw.

    • @uglynaija
      @uglynaija 5 ปีที่แล้ว +1

      Allen Rodriguez yeah Ik at my school this a priority standard

    • @abigailrichard5629
      @abigailrichard5629 5 ปีที่แล้ว +1

      @@Allen-zq4lp trig is covered in geometry, i'm pretty sure they knew that

    • @juanitabalanza2297
      @juanitabalanza2297 5 ปีที่แล้ว

      Lol

  • @anonymouss5661
    @anonymouss5661 3 ปีที่แล้ว +26

    😂Who else is watching this before a math exam😅

    • @Thuwiba.
      @Thuwiba. 3 ปีที่แล้ว +1

      before one hour of exam 😭😂😂

    • @salaarasim3038
      @salaarasim3038 7 หลายเดือนก่อน

      3 hours before

    • @Rebrodie
      @Rebrodie 6 หลายเดือนก่อน

      1 hour and a half b4 exam 😭😭

    • @gameanation4311
      @gameanation4311 6 หลายเดือนก่อน +1

      MY TEST IS TODAL LMAO 💀

  • @femyceanneombega2986
    @femyceanneombega2986 3 ปีที่แล้ว

    Lol, this is my first time learning in advance, our lessons in math isn't about this but meh, this is actually fascinating that I wanted to learn it fast lol