Question

HELP!!!!!! please by substitution integrates C%20dx%20" id="TexFormula1" title=" \int\ Sen^{3}xCosx \, dx " alt=" \int\ Sen^{3}xCosx \, dx " align="absmiddle" class="latex-formula">

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