Verified answer

sin 2x = 2sinxcosx

2sinxcosx - cosx = 0

cosx(2sinx - 1) = 0

cosx = 0 2sinx - 1 = 0

sinx = 1/2

x = 90 and 270 x = 30

so x = 30, 90 and 270 (degrees)

radian form = π/6 , π/2 and 3π/2

2*sin(x)*cos(x) - cos(x) = 0

cos(x)*(2*sin(x) - 1) = 0

cos(x) = 0 or sin(x) = 1/2

x = pi/2, 3pi/2, pi/6, 5pi/6