1
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

Consider the ellipse $\frac{x^2}{\cos ^2 \alpha}+\frac{y^2}{\sin ^2 \alpha}=1$, where $\alpha \in\left(0, \frac{\pi}{4}\right)$. Then, locus of point of intersection of one of the directrix and tangent at upper end of minor axis is

A
$x \sqrt{1-y^2}=\left(1-2 y^2\right)$
B
$x \sqrt{1-2 y^2}=\left(1-y^2\right)^2$
C
$x^2\left(1-y^2\right)=\left(1-2 y^2\right)$
D
$x^2\left(1-2 y^2\right)=\left(1-y^2\right)^2$
2
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

If $A, B$ are two square matrices, such that $A B=A, B A=B$, then $(A+B)^7$ equals

A
$A+B$
B
$2^7(A+B)$
C
$2^6(A+B)$
D
$2^8(A+B)$
3
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

$$ \int_0^\pi\left[\cos ^2\left(\frac{3 \pi}{8}-\frac{x}{4}\right)-\cos ^2\left(\frac{11 \pi}{8}+\frac{x}{4}\right)\right] d x$$ equals to

A
$\sqrt2$
B
$\sqrt3$
C
3
D
2
4
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

If the distance between the planes $8 x+12 y-14 z=2$ and $4 x+6 y-7 z=2$ can be expressed as $\frac{1}{\sqrt{N}}$, then the value of $\frac{N(N+1)}{2}$ is

A
4950
B
5050
C
5150
D
5151
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