Grade 12 Trigonometry Lesson 6| Trig expressions without a Calculator (Triangle method)
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- เผยแพร่เมื่อ 13 ก.พ. 2022
- Learn how to simplify trig expressions without the use of a calculator by using the CAST traingle method.
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I started from lesson 1 now I'm on 6 and I'm getting better with trig
Thank you sir❤️
A) -¾
B)24/7 ( expanded it to sin2X/cos2X)
You’re working hard 😊
@@MlungisiNkosi Pushing for 100% sir
Thank you sir you are doing a great job by helping us 😊👍may God bless you 🙏❤
Hey sir! for the last example, I think you used the incorrect double angle identity. You can confirm if I am mistaken.
I’ll check it. Thank you… it happens to the best of us.
I also saw it
Yeah sure
hey how’d you notice
@@KeithNjenge compound identites of cos2x
Last example you used the double identity for sin instead of the one for cos
Thank you
If I may ask this in which quadrant are we working on and what are co ordinates of x and y ? Help I'm stuck
Thank you sir I'm now following from Ghana
Welcome 🇬🇭
I really enjoyed your country when I visited
(a) -3/4
(b) 24/7
Sir I got -21/4 for the first one and -24/7 for the second one
good evening, I don't know if you noticed but you made the double angle of sin instead of a double angle of cos at the end of the video.
Apologies… 🥴
Hi Sir, with regards to the last sum we are supposed to do on our own for b) tan2x i get 12/7. What exactly am i doing wrong?
It would be very difficult to tell. Please send me your solution on email: info@mlungisinkosi.co.za
Much appreciated!
Please do Euclidean Geometry after Trigonometry
Definitely
First answer -21/4
Second-24/7
Got A)- 3/4 b) 24/7
Sir for a i got -3/4
Then for b i got 24/7
And the last example u made a mistake abt the double angle...and rectified it and i got 1--k² ...is it correct ?????
Sir I got -3/4 for a
And b I got 24/7
You get an A+
a)=-3/4
b)=24/7
First answer -3/4 and second answer is 3/2 are they both correct sir?
I will attach the answers on the description of the video…
a)=-3/4
b)24/7
Thank you 😊
found the answer to -3/4 for and 24/7 for b
Very well done
First answer is -3/4
Second answer is 24/7
Well done
Please explain to how you got 180+17 please I am confused
Please provide time stamp
I got A = -9/1, b= 24/7
Sir for a) I keep getting 1 as the answer
I don't know where I went wrong
That is correct
First answer i got 3/4
Second answer i got -27/7
Awesome 👏🏾
-3/4 and 24/7
This is awesome
A=1 and b=24/7
Awesome 👏🏾
Same
Sir I got 21/4 for my first answer and 3/2 for second, 🤷♀️
Thank you for making the attempt… I’ll post the answer in the comment section
Saver
Welcome
Got -3/4
And 3/2
Good 😊
Good day sir(a)my answer I found that is -(21÷5) and for tan is (13÷3) am I correct with my final answers
I’ll see if I can pin the answer on the comment section
Is there any reason behind it sir
I’m not sure I follow your question. Please rephrase
For tan2× the answer I got is -41÷9
I'll pin answer on the comment
I'll pin the answer on the comments section
Sir second answer I got 3/2 so idk
I need to find a way to give the answer in the comments section and pin it
Why am I getting -9/4 and y'all getting -3/4?
Show us how you got to the answer and we’ll show you where you went wrong
Please correct me if I'm wrong. First answer is 135/20
Second answer
24/7.
Someone is working hard ☺️
hey , how did you get to this answer
@@nhlobenhleokuhlemthimkhulu8203 I will post a solution in the comments section
-3/4 and the second 19/16
I think am correct mnnn
Awesome
I got 3/4 and24/7 both positive
I couldn't get the second one 😔
Askies… how may I help?
Try expressing is like this 2sinx.cosx/2cosx²-1
Hi sir for my first answers this is what I got
a.)-3/4
b.)-9/5
Am I correct?
I did another one on 5sin× and the answer I got is -41÷25
Thanks for attempting
And I got 45/20🤷
I can't get both answers😥
How can I assist?
@@MlungisiNkosi oh I tried it and I got to the answer thank you😊
Haibo njani guys cause I got a) -24/7 and b)-72/7 💀💀💀
😭☠️
I get the first answer as - 3/4
Second answer as
24/7
I’m happy that you’re doing your part. Well done
how did you get 24/7? I keep getting 9/16
@@hhh03533 should I make a video link with the solution to this?
@@MlungisiNkosi yes sir.
Sir I'm getting 3/4 instead of -3/4
Show me what you’ve done 😊