Question

Which of the following is/are true?
(A) cos (30° - A) + cos(30° + A) = √3cos A
(B) sin(60° + A) - sin(60° - A) = sin A
(C) cos2theta-cos3theta/sin2theta+sin3theta=tan theta/2
(D) sin^25 theta- sin^2 3theta = sin8theta sin2theta​

Answer 1

Answer:

D)bro my answer is d OK and give my answer