i love it when my teacher understands maths instead of blindly memorising stuff.dats why i love this video cuz he does it in logical way with deep understanding.
The best example of the proof of cos a - b using the distance formula I have seen because you don't just plot the points but show the triangles which give us those points. This visually shows sine a - sine b / cos b - cos a (in your example) works. Because when proving cos a + b by distance formula the points for b are usually moved into the fourth quadrant on the unit circle to make the sine negative, would it be impossible to do a similar video fo the proof of cos a + b showing the triangles and the distance formula?
i love it when my teacher understands maths instead of blindly memorising stuff.dats why i love this video cuz he does it in logical way with deep understanding.
Thank the lord someone made a video on COS compound angle because all the other ones online were for tan and sin, took me ages to find this
Glad to hear, it was one of my first videos to be uploaded...thanks.
The best example of the proof of cos a - b using the distance formula I have seen because you don't just plot the points but show the triangles which give us those points. This visually shows sine a - sine b / cos b - cos a (in your example) works. Because when proving cos a + b by distance formula the points for b are usually moved into the fourth quadrant on the unit circle to make the sine negative, would it be impossible to do a similar video fo the proof of cos a + b showing the triangles and the distance formula?
Superb!! Great job!!!
Thank you! Cheers!
Very clear!Thank you
You are very welcome.
THANKS FOR YOUR VIDEO
Fantastic
Thank you very much
You are welcome
Can someone tell me why radi "1"?
Hi there, it's because the UNIT circle is where the definitions of sine and cosine originate from...