Integral of trig functions

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

arildno

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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

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Just let u = sin(x) again...
 
how about integral of 10^x with respect to x
 
write [itex]10^x = e^{xln10}[/itex]
 

arildno

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Or, set u=10^x
 

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