1.

If the distance of two lines passing through origin from the point \[({{x}_{1}},{{y}_{1}})\] is \['d'\], then the equation of lines is

A. \[{{(x{{y}_{1}}-y{{x}_{1}})}^{2}}={{d}^{2}}({{x}^{2}}+{{y}^{2}})\]
B. \[{{({{x}_{1}}{{y}_{1}}-xy)}^{2}}=({{x}^{2}}+{{y}^{2}})\]
C. \[{{(x{{y}_{1}}+y{{x}_{1}})}^{2}}=({{x}^{2}}-{{y}^{2}})\]
D. \[({{x}^{2}}-{{y}^{2}})=2({{x}_{1}}+{{y}_{1}})\]
Answer» B. \[{{({{x}_{1}}{{y}_{1}}-xy)}^{2}}=({{x}^{2}}+{{y}^{2}})\]


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