Which of the following function is decre

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Target Exam

CUET

Subject

-- Mathematics - Section B1

Chapter

Applications of Derivatives

Question:

Which of the following function is decreasing on $\left(0,\frac{\pi}{2}\right)$?

Options:

$\sin(2x)$

$\tan(x)$

$\cos(x)$

$\cos(3x)$

Correct Answer:

$\cos(x)$

Explanation:

$f(x)=\cos x$ then $f^{\prime}(x)=-\sin x0$ in $\left(0,\frac{\pi}{2}\right)$