Aspire Faculty ID #16543 · Topic: NIMCET 2008 · Just now
NIMCET 2008

A line $L$ has intercepts $a$ and $b$ on the coordinate axes. When the axes are rotated through a given angle, keeping the origin fixed, the same line has intercepts $p$ and $q$. Which of the following is true?

Solution

Intercept form of line remains invariant under rotation in terms of reciprocal squares. Answer: $\boxed{\dfrac{1}{a^2}+\dfrac{1}{b^2}=\dfrac{1}{p^2}+\dfrac{1}{q^2}}$

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