# Simplifying trig equation

1. Nov 6, 2008

### parise19

1. The problem statement, all variables and given/known data

(sec^2 x - 1)/(sin^2 x)

2. Relevant equations

3. The attempt at a solution

i know that the answer is sec^2 x, but i have no idea what steps to take to get there

2. Nov 6, 2008

### Staff: Mentor

What trig identities do you know? There are several that would be helpful here.

3. Nov 7, 2008

### Дьявол

Do you know what sec2x equals to?

secx=1/cosx

Can you try to solve it for your own?

I will help you little bit.

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

Do you know what 1-cos2 equals to?

Regards.

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