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If y =cos ^(-1)(xsin alpha -cos alpha sq...

If `y =cos ^(-1)(xsin alpha -cos alpha sqrt(1-x^(2))),then (dy)/(dx)=`

A

` (-2)/( sqrt(1-x^(2)))`

B

` (2)/( sqrt(1-x^(2)))`

C

` (-1)/( sqrt(1-x^(2)))`

D

` (1)/( sqrt(1-x^(2)))`

Text Solution

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The correct Answer is:
C
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