- #1
- 45
- 0
[tex]\int x^{2} \sqrt{4+x^{2}} dx[/tex]
I've already subbed in:
[tex] x = 2tan\theta [/tex]
[tex] dx = 2sec^{2}\theta d\theta [/tex]
and I've gotten down to:
[tex] 16 \int tan^{3}\theta sec^{3}\theta d\theta [/tex]
But now I have noo idea what to do! Can someone give me a hint?
I've already subbed in:
[tex] x = 2tan\theta [/tex]
[tex] dx = 2sec^{2}\theta d\theta [/tex]
and I've gotten down to:
[tex] 16 \int tan^{3}\theta sec^{3}\theta d\theta [/tex]
But now I have noo idea what to do! Can someone give me a hint?