I can tell that this needs some sort of trig identity in order to solve, but I may be wrong.
How would I set this problem up with regards to u and dv?
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Try it now. Choose u and dv in a way so that the next integral would only have Sine.
So how would that problem look if it was multiplied out? Or should I not do that?
Because that looks confusing and I don't know what to do next.
You cannot multiply x with the inside terms of cosine!
I presume you know what to do next.
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