Question

using integration by substitution what is the integral of cos x e^sinx dx?

Answer 1

substitute u = sin x, cos x dx = du

Answer 2

i got sinx e^sinx +c for the answer

Answer 3

thats right

Answer 4

wouldnt the intergal of sinx be -cosx so du=-cosx dx?

Answer 5

no ..
d(sin x)/dx = cos x
d(cos x)/dx = - sin x

Answer 6

ohh yea..