Integrate cos^8(x)*sin(x)

I already tried (-1/9)cos^9(x), but it's not the right answer. Or at least it's not the answer my online homework is looking for.

Question

Integrate cos^8(x)*sin(x)

I already tried (-1/9)cos^9(x), but it's not the right answer. Or at least it's not the answer my online homework is looking for.

anonymous · Answer

Did you remember to add in the constant?

anonymous · Answer

It's automatically included in the answer with our homework

anonymous · Answer

Maybe it wants you to put the cos function in the numerator

anonymous · Answer

Yeah, that was it. It's really annoying doing online homeworks because even if the answer is correct, the way it's imputed makes it incorrect. Ugh. Thank you for your help!