How do you simplify sin2x=cosx

sin (2x) = cos (x)

2sin (x) cos (x) = cos (x) Expand sin (2x).

2cos (x) 2cos (x) Divide 2cos (x) on each side.

sin (x) = ¹/₂

sin⁻¹[sin (x) ] = sin⁻¹ (¹/₂) Use sin⁻¹ (x) on each side.

x = 30, 150 Find the answer.