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If y=tan^(-1) sqrt((1+cos ((x)/(2)))/(1-...

If `y=tan^(-1) sqrt((1+cos ((x)/(2)))/(1-cos ((x)/(2))),"then " dy/dx=`

A

` (1)/(2) `

B

` (-1)/(2)`

C

` (1)/(4)`

D

` (-1)/(4)`

Text Solution

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The correct Answer is:
D
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