Question #e3529
2 Answers
Mar 12, 2017
Explanation:
Mar 12, 2017
Explanation:
sin x + 2sin 2x = 0
sin x + 2sin x.cos x = 0
sin x(1 + 2cos x) = 0
a. sin x = 0 --> unit circle gives 3 solutions -->
x = 0,
b. 1 + 2cos x = 0
Trig table of special arcs and unit circle give -->
General answers