1
COMEDK 2025 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0
Domain of the function $f(x)=\sqrt{\sin ^{-1}(2 x)+\frac{\pi}{6}}$ for real valued of $x$ is
A
$\left[-\frac{1}{4}, \quad \frac{1}{2}\right]$
B
$\left[-\frac{1}{2}, \frac{1}{2}\right]$
C
$\left[-\frac{1}{4}, \frac{1}{4}\right]$
D
$\left(-\frac{1}{2}, \quad \frac{1}{9}\right)$
2
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
$-\frac{2 \pi}{5}$ is the principal value of
A
$\sin ^{-1}\left[\sin \left(\frac{7 \pi}{5}\right)\right]$
B
$\tan ^{-1}\left[\tan \left(\frac{7 \pi}{5}\right)\right]$
C
$\cos ^{-1}\left[\cos \left(\frac{7 \pi}{5}\right)\right]$
D
$\sec ^{-1}\left[\sec \left(\frac{7 \pi}{5}\right)\right]$
3
COMEDK 2025 Morning Shift
MCQ (Single Correct Answer)
+1
-0
The range of $x$ for which the equation $\sin ^{-1}\left(\frac{2 x}{1+x^2}\right)=2 \tan ^{-1} x$ holds true
A
$|x| \leq 1$
B
$\forall x \in R$
C
$x \geq 0$
D
$|x| \geq 1$
4
COMEDK 2024 Evening Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { Evaluate: } \cot ^{-1}\left(-\frac{3}{\sqrt{3}}\right)-\sec ^{-1}\left(-\frac{2}{\sqrt{2}}\right)-\operatorname{cosec}^{-1}(-1)-\tan ^{-1}(1) $$

A
$$\frac{\pi}{6}$$
B
$$-\frac{2 \pi}{3}$$
C
0
D
$$\frac{\pi}{3}$$
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