- #1
Flammadeao
- 4
- 0
Homework Statement
[tex]\int[/tex][tex]\frac{sin(2x)}{1+cos(x)^2}[/tex]
Homework Equations
None?
The Attempt at a Solution
I know I can use a trig identity to end up with a numerator of -- 2sin(x)cos(x)
So:
[tex]\int[/tex][tex]\frac{2sin(x)cos(x)}{1+cos(x)^2}[/tex]
I am using u=1+cos(x)^2 and du=-2sin(x)dx
Substitute in and I end up with
[tex]\int[/tex][tex]\frac{-cos(x)}{u}[/tex]du
And that's where I hit a wall, because I still have a cos(x) in there. Anyone willing to offer hints on this one? Thanks much!