(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I'm trying to solve two similar equations, but I can't go on.

This is the first one

http://img818.imageshack.us/img818/298/imageevsu.jpg [Broken]

This is the second one:

http://img7.imageshack.us/img7/7812/imageowud.jpg [Broken]

2. Relevant equations

3. The attempt at a solution

For the first one:

http://img855.imageshack.us/img855/4633/imagekhd.jpg [Broken]

And for the second equation:

http://img12.imageshack.us/img12/2990/imageiag.jpg [Broken]

And I'm stuck with these cos^3x and sin^3x. I think I should replace something...

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

2. Relevant equations

3. The attempt at a solution

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# Homework Help: Trigonometric Equations - Why Do I Always Get cos^3 or sin^3?

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