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1
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

The differential equation of all non-vertical lines in a plane is

A
$$\frac{d^2 y}{d x^2}=0$$
B
$$\frac{d^2 x}{d y^2}=0$$
C
$$\frac{d y}{d x}=0$$
D
$$\frac{d x}{d y}=0$$
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

The general solution of $$\left(\frac{d y}{d x}\right)^2=1-x^2-y^2+x^2 y^2$$ is

A
$$2 \sin ^{-1} y=x \sqrt{1-x^2}+\sin ^{-1} x+C$$
B
$$\cos ^{-1} y=x \cos ^{-1} x$$
C
$$\sin ^{-1} y=\frac{1}{2} \sin ^{-1} x+C$$
D
$$2 \sin ^{-1} y=x \sqrt{1-y^2}+C$$
3
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

The solution of the differential equation $$\left(\frac{d y}{d x}\right) \tan y=\sin (x+y)+\sin (x-y)$$ is

A
$$\sec x=-2 \sec y+C$$
B
$$\sec y=2 \cos y+C$$
C
$$\sec y=-2 \cos x+C$$
D
$$\sec x=-2 \cos y+C$$
4
COMEDK 2023 Evening Shift
MCQ (Single Correct Answer)
+1
-0

The particular solution of $$e^{\frac{d y}{d x}}=2 x+1$$ given that $$y=1$$ when $$x=0$$ is

A
$$ y=\left(x+\frac{1}{2}\right) \log |2 x+1|-x+1 $$
B
$$ y=(x+1) \log |2 x+1|-x+1 $$
C
$$ y=\left(x+\frac{1}{2}\right) \log |2 x+1|-\frac{1}{2} x+1 $$
D
$$ y=\left(x-\frac{1}{2}\right) \log |2 x+1|-x-1 $$
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