1
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

The roots of the equation $$\cos x+\sqrt{3} \sin x=2 \cos 2 x$$, are

A
$$-2 n \pi+\frac{\pi}{3}, n \in Z$$
B
$$\frac{2 n \pi}{3}+\frac{\pi}{9}, n \in Z$$
C
$$2 n \pi-\frac{\pi}{3}, n \in Z$$
D
$$\frac{2 n \pi}{3}-\frac{\pi}{9}, n \in Z$$
2
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

A force of magnitude $$\sqrt{6}$$ acting along, the line joining points $$A(2,-1,1)$$ and $$B(3,1,2)$$ displaces a particle from $$A$$ to $$B$$. The work done by the force is

A
6
B
6$$\sqrt6$$
C
$$\sqrt6$$
D
12
E
2$$\sqrt6$$
3
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

The domain of $$f(x)=\sqrt{\log \frac{1}{4}\left(\frac{5 x-x^2}{4}\right)}+{ }^{10} C_x$$ is

A
$$(0,1] \cup[4,5)$$
B
$$(0,5)$$
C
$$\{1,4\}$$
D
None of these
4
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

Through a fixed point $$P(\alpha, \beta), a$$, variable line is drawn to cut the coordinate axes at $$A$$ and $$B$$. The locus of the mid-point of $$A B$$ is

A
a hyperbola with eccentricity 2
B
a hyperbola with centre $$\left(\frac{\alpha}{2}, \frac{\beta}{2}\right)$$
C
a hyperbola with asymptotes along axes
D
not a hyperbola
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