# Trig Identity

• May 27th 2011, 12:07 AM
dagbayani481
Trig Identity
Hey guys, I need a good refresher on identities. It has been awhile and Finals week is coming up. I'm stuck on this practice question our teacher gave us:

Simplify: $\displaystyle \frac{1+secx}{sinx+tanx}$

Edit: for some reason latex isn't working right for me but the following equation is as follows:
(1+secx)/(sinx+tanx)

I believe this simplifies to cscx but I can't seem to figure out how to get to it.
• May 27th 2011, 12:49 AM
Prove It
Start by writing everything in terms of sin(x) and cos(x), then getting common denominators...
• May 27th 2011, 01:21 AM
sa-ri-ga-ma
Quote:

Originally Posted by dagbayani481
Hey guys, I need a good refresher on identities. It has been awhile and Finals week is coming up. I'm stuck on this practice question our teacher gave us:

Simplify: $\displaystyle \frac{1+secx}{sinx+tanx}$

Edit: for some reason latex isn't working right for me but the following equation is as follows:
(1+secx)/(sinx+tanx)

I believe this simplifies to cscx but I can't seem to figure out how to get to it.

tan(x) can be written as sin(x)/ cos(x) = sin(x)*sec(x),. Put this in the problem and simplify.