Question

HELP!!!!!! please
by substitution integrates

`\int\ Sen^(3)xCosx \, dx`

Answer 1

Hello,

I suppose you means

As (sin(x))'=cos(x)


`\int\limits{sin^3(x)*cos(x)x} \, dx`
=1/4*sin ^4(x)+C
since

`\int\limits{u^3} \, du=u^4/4+C`