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**[SOLVED] Integrate (1/(1-cos x)) dx**

**1. Homework Statement**

[tex]\int \frac{1}{1-cos x} dx[/tex]

**2. Homework Equations**

**3. The Attempt at a Solution**

I found in the book where they used the [tex]cos x= \frac{1-z^2}{1+z^2}[/tex], but we haven't went over this in class yet. I'm wandering what my other options are to integrate this problem? Can anyone please give me a good start on finding this integral? Thanks for your help!