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Question: Line L has intercepts a and b on the co-ordinate axes. When the axes are rotated through a given angle keeping the origin fixed, the same line L has intercepts p and q, then


1) ${{a}^{2}}+{{b}^{2}}={{p}^{2}}+{{q}^{2}}$
2) $\frac{1}{{{a}^{2}}}+\frac{1}{{{b}^{2}}}=\frac{1}{{{p}^{2}}}+\frac{1}{{{q}^{2}}}$
3) ${{a}^{2}}+{{p}^{2}}={{b}^{2}}+{{q}^{2}}$
4) $\frac{1}{{{a}^{2}}}+\frac{1}{{{p}^{2}}}=\frac{1}{{{b}^{2}}}+\frac{1}{{{q}^{2}}}$
Solution: Explanation: No Explanation
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