Posted by matrix school 2 on Thursday, August 6, 2009 at 1:46pm.
(1) Do you mean dx/(25+(x-5)^2) or dx(1/25+(x-5)^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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