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The locus of the mid point of then inter...

The locus of the mid point of then intercept of the variable line `xcosa+y sin a=p` (p constant) between the coordinate axes is a.`x^(-2)+y^(-2)=p^(-2)` b. `x^(-2)+y^(-2)=2p^(-2)` c. `x^(-2)+y^(-2)=4p^(-2)` d. none of these

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