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intcos^5x dx...

`intcos^5x dx`

Text Solution

Verified by Experts

Given,
I=`intcos^5x dx`
`I=∫(cos^4x)cos(x)dx`
`I=∫(cos^2x)^2cos(x)dx`
`I=∫(1−sin^2x)^2cos(x)dx .. (i)`
let `sinx=t`
`=>(cosx)dx=dt`
Putting in (i) we get ...
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