Since sin 2x = 2sin x.cos x, we get:
4sin x - 6sin x.cos x = 0
sin x(4 - 6cos x) = 0
Trig table and unit circle -->
a. sin x = 0 -->
b. 4 - 6cos x = 0
cos x = 4/6 = 2/3 --> x = +- 48^@19
Arc (-48.19) and arc (360 - 48.19 = 311.81) are co-terminal
Answers for (0, 360)