# Thread: Please help with Trig question!

1. ## Please help with sec, cos and tan question?

Hi, I would really appriciate some help with this question. I am confused about how to solve it. Thank you so much!!

Question: Prove the following algebraically:

sec x - sin x tan x= cos x

2. Originally Posted by Polkadotprincess19
Hi, I would really appriciate some help with this question. I am confused about how to solve it. Thank you so much!!

Question: Prove the following algebraically:

sec x - sin x tan x= cos x
$\frac{1}{\cos(x)} - \frac{\sin^2(x)}{\cos(x)} = \frac{1-\sin^2(x)}{\cos(x)}$

Use the Pythagorean Identity to simplify

3. Thank you!