Mathematics · 2021
JEE Main · 25 February 2021, Shift 1 · Q72
If the curves, x^2/a+y^2/b=1 and x^2/c+y^2/d=1 intersect each other at an angle of 90°, then which of the following relations is TRUE?
If the curves, $\displaystyle \frac{x^2}{\mathrm{a}}+\frac{y^2}{\mathrm{~b}}=1$ and $\displaystyle \frac{x^2}{\mathrm{c}}+\frac{y^2}{\mathrm{~d}}=1$ intersect each other at an angle of $\displaystyle 90$°, then which of the following relations is TRUE ?
Official answer
(2)
$\displaystyle \mathrm{a}-\mathrm{b}=\mathrm{c}-\mathrm{d}$
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JEE Main 2021 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.