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If 2 costheta = x +1/x and 2cosphi=y+1/y...

If `2 costheta = x +1/x` and `2cosphi=y+1/y`, then

A

`(x)/(y)+(y)/(x)`

B

`2((x)/(y)+(y)/(x))`

C

`(1)/(2)(xy+(1)/(xy))`

D

`xy+(1)/(xy)`

Text Solution

Verified by Experts

The correct Answer is:
C
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