# Integral of trig functions

## Main Question or Discussion Point

how do i integrate -- cosx/((sinx)^2 + 1) with respect to x

arildno
Homework Helper
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Set u=sin(x)

oh wow , why didnt i think of that ?
thanks alot:surprised

what is the integral of ∫ cosx/(sinx)^9 with respect to x.
i think this one is a bit challenging

nicksauce
Homework Helper
Just let u = sin(x) again...

how about integral of 10^x with respect to x

write $10^x = e^{xln10}$

arildno