# How do I integrate

1. Apr 30, 2010

### mickellowery

What method would I use to integrate cos(x)/1+sin^2(x)dx? I was thinking by parts but it isn't working for me.

2. Apr 30, 2010

### lugita15

Try a u substitution.

3. Apr 30, 2010

### elect_eng

Try a substitution. Notice that cos(x) is the derivative of sin(x).

4. Apr 30, 2010

### mickellowery

Wouldn't the derivative of sin^2(x) be 2sin(x)cos(x)? I think I'm still a little lost.

5. Apr 30, 2010

### Live2Learn

Try getting it into this format

$$\int \frac{du}{1+u^2}$$