Question

stuck on an integral problem

Answer 1

i dont get how they got that

Answer 2

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.

Answer 3

so that makes the one out front disappear right?

Answer 4

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.

Answer 5

oh alright i get it now

Answer 6

Alright, cool :)

Answer 7

thank you!

Answer 8

No problem. Good luck!