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Tangents are drawn from the origin to th...

Tangents are drawn from the origin to the curve `y=cos X`. Their points of contact lie on

A

`x^(2)y^(2)=y^(2)-x^(2)`

B

`x^(2)y^(2) =x^(2)+y^(2)`

C

`x^(2)y^(2)=x^(2)-y^(2)`

D

None of these

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The correct Answer is:
C
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