Find the point at which the slope of the...

Find the point at which the slope of the tangent of the fucntion f(X) =`e^(x)` cos x attains minima when `x in [0,2pi]`

A

`x = pi`

B

`x = pi/4`

C

`x = (3pi)/4`

D

`x = (3pi)/2`

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The correct Answer is:

A

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