The equation of tangent to the curve y=2...

The equation of tangent to the curve `y=2cos x` at `x=(pi)/4` is

A

`y - sqrt2 = 2sqrt2 (x-pi/4)`

B

`y + sqrt2 = sqrt2 (x+pi/4)`

C

`y-sqrt2 = -sqrt2 (x -pi/4)`

D

`y-sqrt2 = sqrt2(x-pi/4)`

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The correct Answer is:

C

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