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Integrate the functions cos^4 2x...

Integrate the functions `cos^4 2x`

Text Solution

Verified by Experts

We know that, `cos4x=2cos^2(2x)-1`
`=>cos^2(2x)=((1+cos4x)/2)`
Squaring both side and we get
`=>cos^4(2x)=((1+cos4x)/2)^2`
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