1.

If x sintheta+ycostheta=2 & x sintheta-ycostheta=0 then which option is correct?

Answer»

`X^(2)+y^(2)=4`
`x^(2)+y^(2)=1`
`(1)/(x^(2))+(1)/(y^(2))=1`
`(1)/(x^(2))+(1)/(y^(2))=4`

Answer :C


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