# Factoring trig equations (2) [Pending...]

**phinah** 25 Jul 2018, 15:30

### My question

With an equation of the form 2 `sin^2` x + sin 2x = 0, I need help in determining a first step to solving it.

### Relevant page

5. Trigonometric Equations

### What I've done so far

Tried to go the route of (2 sin x + ....)(sin x + .... ) but saw immediately it is a no-go.

X

With an equation of the form 2 `sin^2` x + sin 2x = 0, I need help in determining a first step to solving it.

Relevant page
<a href="https://www.intmath.com/analytic-trigonometry/5-trigonometric-equations.php">5. Trigonometric Equations</a>
What I've done so far
Tried to go the route of (2 sin x + ....)(sin x + .... ) but saw immediately it is a no-go.

## Re: Factoring trig equations (2)

**Murray** 26 Jul 2018, 21:28

My hint is to remind yourself of the first formula on this page: Double Angle Formulas

X

My hint is to remind yourself of the first formula on this page: <a href="https://www.intmath.com/analytic-trigonometry/3-double-angle-formulas.php">Double Angle Formulas</a>

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