1
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

If $$\theta_1, \theta_2$$ and $$\theta_3$$ are the angles made by a line with the positive direction of $$X, Y$$ and $$Z$$-axes, then $$\cos 2 \theta_1+\cos 2 \theta_2+\cos 2 \theta_3$$ is equal to

A
$$-$$1
B
1
C
2
D
$$-$$2
2
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

Suppose, $$A=\left[\begin{array}{lll}a_1 & b_1 & c_1 \\ a_2 & b_2 & c_2 \\ a_3 & b_3 & c_3\end{array}\right]$$ is an adjoint of the matrix $$\left[\begin{array}{rrr}1 & 3 & -3 \\ 1 & 4 & 3 \\ 1 & 3 & 4\end{array}\right]$$. The value of $$\frac{a_1+b_2+c_3}{b_1 a_2}$$ is

A
3
B
0
C
5
D
4
3
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The maximum slope of the curve $$y=\frac{1}{2} x^4-5 x^3+18 x^2-19 x+7$$ occurs at the point

A
$$(2,9)$$
B
$$(2,2)$$
C
$$(0,0)$$
D
$$\left(3, \frac{21}{2}\right)$$
4
VITEEE 2023
MCQ (Single Correct Answer)
+1
-0

The solution of $$d y / d x=1+x+y+x y$$ is

A
$$x+y=c(1+x y)$$
B
$$\log (1+x)+x+y=c$$
C
$$\log (1+y)=x+\frac{x^2}{2}+C$$
D
None of these
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