1.

A(a,0) , B(-a,0) are two point . If a point P moves such that anglePAB - anglePBA = 2alpha then find the locus of P .

Answer»

`X^(2)+y^(2)+2XY cot2alpha=a^(2)`
`x^(2)-y^(2)+2xy TAN 2alpha=a^(2)`
`x^(2)+y^(2)-2xy tan 2alpha=a^(2)`
`x^(2)-y^(2)+2xy cot2alpha=a^(2)`

ANSWER :D


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