Question

For 0° ≤ x < 360°, what are the solutions to cos(x/2) – sin(x) = 0?

A{0°, 60°, 300°}
B{0°,120°, 240°}
C{60°, 180°, 300°}
D{120°,180°, 240°}
Precalc

Answer 1

the answer is c

Explanation:

cos30 = sin60

then cos30 - sin 30 = 0

c is the only choice which can satisfy in the problem