# Math Help - trig integration

1. ## trig integration

$\sigma 4sinx + cosx dx$

2. Originally Posted by henri
$\sigma 4sinx + cosx dx$
do mean integral of that? if you do:

$\int 4sinx + xcosxdx$

$\int 4sinx + \int xcosxdx$

$-4cosx + C +$__________

here let $u=x$
$du=dx$
$dv=cosx$
$v=sinx$

then use integration by parts.

can you finish from here?