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If y=sin t -cos t and x=sin t+cost, then...

If `y=sin t -cos t` and `x=sin t+cost`, then `(dy)/(dx)` at `t=(pi)/(6)` is :

A

1

B

`2+sqrt(3)`

C

0

D

`(sqrt(3)-1)/(2)`

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EDUCART PUBLICATION-SAMPLE PAPER 11 -SECTION- B
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