# How do you solve #Sin(3x) - sin(6x) = 0#?

##### 1 Answer

May 14, 2016

#### Explanation:

Use the trig identity: sin 2a + 2sin a.cos a.

Replace in the equation sin (6x) by 2sin (3x).cos (3x) -->

sin (3x) - 2sin (3x).cos (3x) = 0

sin (3x)(1 - 2cos 3x) = 0

a. sin 3x = 0 --> 3x = 0 and

b.

Note: the arc