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If x=cos (logt ) ,y log (cost ) ,then (...

If ` x=cos (logt ) ,y log (cost ) ,then (dy)/(dx) =`

A

` (-tcos t )/( sin (logt) )`

B

` (tcot t )/( sin (logt) )`

C

` (-t tan t )/( sin (logt) )`

D

` (t tan t )/( sin (logt) )`

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The correct Answer is:
D
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