If y=1-costheta,x=1-sintheta,then (dy)/(...

If `y=1-costheta,x=1-sintheta,then (dy)/(dx) at theta=(pi)/(4) is`

A

`-1`

B

2

C

`(1)/(2)`

D

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

Verified by Experts

The correct Answer is:

A

`-1`

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