Evaluate: (i) `intsqrt((1+cos2x)/2)\ dx` (ii) `intsqrt((1-cos2x)/2)\ dx`

Explanation

(i)
`int sqrt{frac{1+cos 2 x}{2}} d x `

`int sqrt{frac{2 cos ^{2} x}{2}} d x[therefore 1+cos 2 A=2 cos ^{2} A] `

`=int cos x {dx} `

`=sin x+C`


(ii)


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