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

A unit vector perpendicular to both the vectors $$\hat{\mathbf{i}}+\hat{\mathbf{j}}$$ and $$\hat{\mathbf{j}}+\hat{\mathbf{k}}$$ is

A
$$\frac{-\hat{\mathbf{i}}-\hat{\mathbf{j}}+\hat{\mathbf{k}}}{\sqrt{3}}$$
B
$$\frac{\hat{\mathbf{i}}+\hat{\mathbf{j}}-\hat{\mathbf{k}}}{3}$$
C
$$\frac{\hat{\mathbf{i}}+\hat{\mathbf{j}}+\hat{\mathbf{k}}}{\sqrt{3}}$$
D
$$\frac{\hat{\mathbf{i}}-\hat{\mathbf{j}}+\hat{\mathbf{k}}}{\sqrt{3}}$$
2
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

Find the solution of equation $$\frac{d y}{d x}=\frac{1}{\cos (x+y)}$$

A
$$\cot \left(\frac{x+y}{2}\right)+c$$
B
$$\sec \left(\frac{x+y}{2}\right)+c$$
C
$$\tan \left(\frac{x+y}{2}\right)+c$$
D
$$-\cot \left(\frac{x-y}{2}\right)+c$$
3
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

Find the solution of $$\frac{d y}{d x}=\frac{1}{\cos (x-y)}$$

A
$$-\cot \left(\frac{x+y}{2}\right)+c$$
B
$$\operatorname{cosec}^2\left(\frac{x+y}{2}\right)+c$$
C
$$\tan \left(\frac{x+y}{2}\right)+c$$
D
$$\cot \left(\frac{x-y}{2}\right)+c$$
4
VITEEE 2022
MCQ (Single Correct Answer)
+1
-0

An urn contains 5 red marbles, 4 black marbles and 3 white marbles. Then the number of ways in which 4 marbles can be drawn so that at the most three of them are red is

A
590
B
490
C
430
D
510
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