stuck on an integral problem

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stuck on an integral problem

Mathematics
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i dont get how they got that
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So the siny was distributed. The first term, the -cosy is simply the integral of siny. For everything other term, the u-substitution involved making u = cosy. That substitution would have cancelled out all of the siny's and just made them basic power rule integrals.
so that makes the one out front disappear right?

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Yeah, the siny would cancel. Now, you dont absolutely have to distribute the siny, like I said, before integrating, I just think it makes less room for error.
oh alright i get it now
Alright, cool :)
thank you!
No problem. Good luck!

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