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For the curve x = e^(t) cos t, y = e^(t)...

For the curve `x = e^(t) cos t, y = e^(t) sin t` the tangent line is parallel to x-axis when t is equal to

A

`-(pi)/(4)`

B

`(pi)/(4)`

C

0

D

`(pi)/(3)`

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A
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