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[" 11.Given "P=(a,0)" and "Q=(-a,0)" and...

[" 11.Given "P=(a,0)" and "Q=(-a,0)" and "R" is a "],[" variable point on one side of the line "PQ" such "],[" that "/_RPQ-/_RQP=2 alpha." The locus of the "],[" point "R" is "],[" 1) "x^(2)+y^(2)+2xy cot2 alpha=a^(2)],[" 2) "x^(2)-y^(2)+2xy tan2 alpha=a^(2)],[" 3) "x^(2)+y^(2)-2xy tan2 alpha=a^(2)]

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