Question

sin 2 a =2 sin a cos a​

Answer 1

Answer:

from identity sin 2a = 2 sin a cos a

Explanation:  sin 2a = sin (a + a)

sin (a + a) = sin a cos a + cos a sin a

sin(a + a) = 2 sin a cos a

therefore,  sin 2a = 2 sin a cos a