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sqrt(sin 2x) cos 2x...

` sqrt(sin 2x) cos 2x`

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` int sqrt(sin 2 x ) cos 2x dx " " underset(2 cos 2x dx =dt)(" Let " sin 2 x=t)`
` = int sqrt(t) (dt)/(2) " " rArr cos 2x dx = (dt)/(2)`
`=(1)/(2) , (t^(3//2))/(3//2) +c= (1)/(3) (sin 2x)^(3//2) +c`
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