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**Ackbeet** I do trig substitutions all the same way.

4. Transfer the integrand, the differential, and the limits (if you're doing a definite integral) into the theta domain.

5. Perform the rest of the integration in the theta domain. If you have a definite integral, you can finish here. Otherwise,

6. In the case of an indefinite integral, transfer back to the original variable's domain. You can use your triangle that you drew and labeled in order to do this easily.

So, what do you think now? Where would you start?