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If an equation of tangent to the curve, ...

If an equation of tangent to the curve, `y=cos(x+y), -1I le x le 1+pi, is x+2y=k` then k is equal to :

A

1

B

2

C

`(pi)/(4)`

D

`(pi)/(2)`

Text Solution

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The correct Answer is:
D
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