Mathematics · 2019
JEE Main · 12 January 2019, Shift 1 · Q72
Let S be the set of all points in (-π, π) at which the function, f(x)= min { sin x, cos x} is not differentiable. Then S is a subset of which of the…
Let S be the set of all points in $\displaystyle (-\pi, \pi)$ at which the function, $\displaystyle f(x)=\min \{\sin x, \cos x\}$ is not differentiable. Then S is a subset of which of the following ?
Official answer
(2)
$\displaystyle \left\{-\frac{3 \pi}{4},-\frac{\pi}{4}, \frac{3 \pi}{4}, \frac{\pi}{4}\right\}$
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JEE Main 2019 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.