Question #0ff6c
1 Answer
May 15, 2016
Prove trig identity.
Explanation:
Apply the trig identity:
sin (a + b) = sin a.cos b + sin b.cos a
sin (8x) = sin (4x + 4x) = sin (4x).cos (4x) + sin (4x).cos (4x)
= 2sin (4x).cos (4x).
