# Trig. Identities

• Feb 14th 2011, 08:06 PM
jonnygill
Trig. Identities
Hello!

How do I solve the following equation...

$2\cos^2\Theta=2+\sin^2\Theta$

First time using latex.
• Feb 14th 2011, 08:08 PM
dwsmith
Quote:

Originally Posted by jonnygill
Hello!

How do I solve the following equation...

$2\cos^2\Theta=2+\sin^2\Theta$

First time using latex.

Wasn't paying attention with my help.
• Feb 14th 2011, 08:18 PM
pickslides
Quote:

Originally Posted by jonnygill

How do I solve the following equation...

$2\cos^2\Theta=2+\sin^2\Theta$

By inspection $\displaystyle\Theta =0$ is a solution, or make $\displaystyle \cos^2\Theta = 1-\sin^2\Theta$ to solve it in terms of $\displaystyle\sin\Theta$