1
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { The particular solution of the differential equation }(x-y)(d x+d y)=(d x-d y) \text { when } y=-1 \text { and } x=0 \text { is } $$

A

$$ \log |x+y|=x-y+1 $$

B

$$ \log \left|\frac{x-y}{x+y}\right|=1 $$

C

$$ \log |x-y|=x+y+1 $$

D

$$ \log |x-y|=x-y+1 $$

2
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

$$ \int \tan ^{-1}\left(\sqrt{\frac{1-\sin x}{1+\sin x}}\right) d x= $$

A

$$ \frac{\pi}{4} x-\frac{x^2}{4}+C $$

B

$$ \frac{\pi}{4} x-\frac{x^2}{2}+C $$

C

$$ \frac{\pi}{2} x-\frac{x^2}{4}+C $$

D

$$ \frac{\pi}{4}-\frac{x}{4}+C $$

3
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

The area enclosed by the curve $y=-x^2$ and the line $x+y+2=0$ is

A

$4.5 $ sq units

B

$3 .5$ sq units

C

$4 $ sq units

D

$5 .5$ sq units

4
COMEDK 2026 Afternoon Shift
MCQ (Single Correct Answer)
+1
-0

Let $A=\left[a_{i j}\right]$ be a square matrix of order $3 \times 3$, where the elements are defined as $a_{i j}=\left\{\begin{array}{ll}i-2 j & \text { if } i=j \\ 0 & \text { if } i> j \\ 1 & \text { if } i < j\end{array} \quad\right.$ then the value of $\left|A^t\right|$ is

A

-6

B

1

C

-5

D

-11