1.

The locus of the point, whose chord of contact w.r.t the circlex^(2)+y^(2)=a^(2) makes an angle 2alpha at the centre of the circle is

Answer»

`X^(2)+y^(2)=2R^(2)`
`x^(2)+y^(2)=r^(2)cos^(2) theta`
`x^(2)+y^(2)=(r^(2))/2`
`x^(2)+y^(2)=r^(2)sec^(2)theta`

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