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x = t cos t, y = t + sin t " then " ( ...

` x = t cos t, y = t + sin t " then " ( d^(2) x)/( dy^(2)) " at t " = (pi)/(2)` is equal to

A

`(pi + 4)/(2)`

B

`- (pi + 4)/( 2)`

C

` -2`

D

None of these

Text Solution

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The correct Answer is:
B
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