If xsintheta=ycostheta=(2ztantheta)/(1-t...

If `xsintheta=ycostheta=(2ztantheta)/(1-tan^2theta),` then `4z^2(x^2+y^2)=`

A

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

B

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

C

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

D

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

Verified by Experts

The correct Answer is:

C

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