## Question

###### If two points $A(a, 0)$ and $B(-a, 0)$ are stationary and if $angle A-angle B=heta$ in $Delta A B C$, the locus of $C$ is(A) $x^{2}+y^{2}+2 x y an heta=a^{2}$(B) $x^{2}-y^{2}+2 x y an heta=a^{2}$(C) $x^{2}+y^{2}+2 x y cot heta=a^{2}$(D) $x^{2}-y^{2}+2 x y cot heta=a^{2}$

If two points $A(a, 0)$ and $B(-a, 0)$ are stationary and if $angle A-angle B= heta$ in $Delta A B C$, the locus of $C$ is (A) $x^{2}+y^{2}+2 x y an heta=a^{2}$ (B) $x^{2}-y^{2}+2 x y an heta=a^{2}$ (C) $x^{2}+y^{2}+2 x y cot heta=a^{2}$ (D) $x^{2}-y^{2}+2 x y cot heta=a^{2}$

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