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Ify=1- cos theta, x =1 - sin theta,then ...

If`y=1- cos theta, x =1 - sin theta,then (dy)/(dx) " at " theta = (pi)/(4) is `

A

` -1`

B

`1`

C

`(1)/(2) `

D

`(1)/(sqrt( 2))`

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The correct Answer is:
A
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