Problem with using Power-Reducing Trigonometric identities

[greerhead]

Homework Statement

Tan^3Theta

Homework Equations

Tan^2Theta=1-cos2Theta/1+cosTheta

The Attempt at a Solution

Attached

 

[rock.freak667]

What are you trying to reduce it to?

 

[greerhead]

until there are no terms with a power greater than 1

 

[rock.freak667]

until there are no terms with a power greater than 1

Then you can just replace tan by sin/cos in your third line and multiply out and you will have no term whose power is greater than one.

 

[greerhead]

Thanks! I was over complicating it, like usual.