For the curve y=3sinthetacostheta, x=e^...

For the curve `y=3sinthetacostheta, x=e^(theta)sintheta, 0lt=thetalt=pi,` the tangent is parallel to x-axis when `theta` is :

A

`(3pi)/(4)`

B

`(pi)/(4)`

C

`(pi)/(2)`

D

`(pi)/(6)`

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The correct Answer is:

B

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