1.

Locus of midpoint of the portion between the axes of \[x\cos \alpha +y\sin \alpha =p\] where p is constant is

A. \[{{x}^{2}}+{{y}^{2}}=\frac{4}{{{p}^{2}}}\]
B. \[{{x}^{2}}+{{y}^{2}}=4{{p}^{2}}\]
C. \[\frac{1}{{{x}^{2}}}+\frac{1}{{{y}^{2}}}=\frac{2}{{{p}^{2}}}\]
D. \[\frac{1}{{{x}^{2}}}+\frac{1}{{{y}^{2}}}=\frac{4}{{{p}^{2}}}\]
Answer» E.


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