Mathematics · 2019
JEE Main · 12 January 2019, Shift 1 · Q89
Considering only the principal values of inverse functions, the set A={x ≥ 0: tan^-1(2 x)+ tan^-1(3 x)=(π)/4}
Considering only the principal values of inverse functions, the set
$$A=\left\{x \geq 0: \tan ^{-1}(2 x)+\tan ^{-1}(3 x)=\frac{\pi}{4}\right\}
$$
Official answer
(2)
is a singleton
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.