1
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+2
-0

A tetrahedron has verticles $$P(1,2,1), Q(2,1,3), R(-1,1,2)$$ and $$O(0,0,0)$$. Then the angle between the faces $$O P Q$$ and $$P Q R$$ is

A
$$\cos ^{-1}\left(\frac{17}{35}\right)$$
B
$$\cos ^{-1}\left(\frac{17}{31}\right)$$
C
$$\cos ^{-1}\left(\frac{19}{35}\right)$$
D
$$\cos ^{-1}\left(\frac{19}{31}\right)$$
2
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+2
-0

The principal value of $$\sin ^{-1}\left(\sin \left(\frac{2 \pi}{3}\right)\right)$$ is

A
$$\left(\frac{\pi}{3}\right)$$
B
$$\left(\frac{2 \pi}{3}\right)$$
C
$$-\left(\frac{2 \pi}{3}\right)$$
D
$$\left(\frac{5 \pi}{3}\right)$$
3
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+2
-0

The differential equation $$\frac{\mathrm{d} y}{\mathrm{~d} x}=\frac{\sqrt{1-y^2}}{y}$$ determines a family of circles with

A
fixed radius of 1 unit and variable centres along the $$X$$-axis
B
fixed radius of 1 unit and variable centres along the $$Y$$-axis
C
variable radii and a fixed centre at $$(0,1)$$
D
variable radii and a fixed centre at $$(0,-1)$$
4
MHT CET 2022 11th August Evening Shift
MCQ (Single Correct Answer)
+2
-0

The value of the integral $$\int_\limits0^1 \sqrt{\frac{1-x}{1+x}} \mathrm{~d} x$$ is

A
$$\left(\frac{\pi}{2}\right)+1$$
B
$$\left(\frac{\pi}{2}\right)-1$$
C
1
D
$$-$$1
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