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Indefinite Integral

1. Homework Statement
The integral of 5*(sin(6x)/sin(3x))dx

3. The Attempt at a Solution

I'm not quite sure what to do with this one. I moved 5 to the left of the integral, but then i'm lost. Apparently i'm rusty on these trig identities.

Could anyone help me get started? Thank you.
 

Answers and Replies

18
0
Look up the double angle formula for sine, wikipedia is good. You should be able to simplify with the bottom some then.
 

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