integral
posted by matrix school 2 .
find the following integral
(1) dx/25+(x5)^2
(2) cos^8xsinxdx

integral 
Marth
(1) Do you mean dx/(25+(x5)^2) or dx(1/25+(x5)^2)?
(2) (cos(x))^8sin(x)dx
let u = cos(x)
du =  sin(x)
= integral(u^8du)
= (u^9)/9 +C
= ((cos(x))^9)/9 +C
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