# Math Help - Simplifying a trigonometric expression.

1. ## Simplifying a trigonometric expression.

I'm sure this a has a simple solution, but I'm just not seeing where to start with this.

1 - $\frac{cos^2x}{1+sin x}$

Thank you so much!

2. Originally Posted by JennyFlowers
I'm sure this a has a simple solution, but I'm just not seeing where to start with this.

1 - $\frac{cos^2x}{1+sin x}$

Thank you so much!
Use

$Cos^2x+Sin^2x=1\Rightarrow\ Cos^2x=1-Sin^2x=(1+Sinx)(1-Sinx)$