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If pi/2 lt x lt pi, then find d/dx(sqrt(...

If `pi/2 lt x lt pi`, then find `d/dx(sqrt((1+cos2x)/2))`

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As we know that` 1+cos 2x = 2sin^2 x`
As, π/2 < x < π
∴ sin x will be positive.
Z=`d/dx(sqrt((1+cos2x)/2))`
Z=`d/dx(sqrt((2sin^2x)/2))`
...
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