1
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { The function } y=\tan x-x \text { is } $$

A
$$ \text { decreasing in }\left(0, \frac{\pi}{4}\right) \text { and increasing in }\left(\frac{\pi}{4}, \frac{\pi}{2}\right) $$
B
$$ \text { a decreasing function in }\left(0, \frac{\pi}{2}\right) $$
C
$$ \text { an increasing function in }\left(0, \frac{\pi}{2}\right) $$
D
$$ \text { increasing in }\left(0, \frac{\pi}{4}\right) \text { and decreasing in }\left(\frac{\pi}{4}, \frac{\pi}{2}\right) $$
2
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

If the sum of the coefficients of the first three terms in the expansion of $$\left(x-\frac{a}{x^2}\right)^{12}, x \neq 0$$ is 559. Find the value of '$$a$$' if '$$a$$' belongs to positive integers

A
5
B
4
C
$$\frac{31}{11}$$
D
3
3
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Evaluate :

$$ \operatorname{cosec}^{-1}\left(-\frac{2 \sqrt{3}}{3}\right)+\tan ^{-1}\left(-\frac{\sqrt{3}}{3}\right)+\sec ^{-1} 2+\cos ^{-1}\left(-\frac{1}{2}\right)-\sin ^{-1}\left(\frac{\sqrt{2}}{2}\right)$$

A
$$ -\frac{\pi}{12} $$
B
$$ -\frac{5\pi}{12} $$
C
$$ \frac{5 \pi}{4} $$
D
$$ \frac{\pi}{4} $$
4
COMEDK 2024 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { Integrating factor of the differential equation } \frac{d y}{d x}+y=\frac{x^3+y}{x} \text { is } $$

A
$$ \frac{x}{e^x} $$
B
$$ e^x $$
C
$$ \frac{e^x}{x} $$
D
$$ x e^x $$
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