Question

Sin2x+2sin4x+sin6x=4cos square x sin4x

Answer 1

can you write this equation on a paper and send this as an attachment

Answer 2

LHS: sin2x + sin6x + 2sin4x = 2sin4x cos2x + 2sin4x

= 2sin4x(cos2x+1) = 2sin4x(2cos²x-1+1)

= 4sin4xcos²x = RHS

Note : sin c + sin d = 2sin (c+d)/2 cos(c-d)/2