Mathematics · 2016
JEE Main · 10 April 2016, Shift 1 · Q72
Let f(x)= sin^4 x+ cos^4 x. Then f is an increasing function in the interval:
Let $\displaystyle f(x)=\sin ^4 x+\cos ^4 x$. Then $\displaystyle f$ is an increasing function in the interval :
Official answer
(2)
$\displaystyle ] \frac{\pi}{4}, \frac{\pi}{2}[$
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JEE Main 2016 Mathematics question, with the answer from NTA’s final answer key. Where our answers come from.