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

If the curves $\frac{x^2}{a}+\frac{y^2}{4}=1$ and $y^3=16 x$ intersect at right angles, then ' $a$ ' equals to

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

$\tan 65^{\circ}, \tan 40^{\circ}+\tan 25^{\circ}$ and $\tan 25^{\circ}$ are in

A
AP
B
GP
C
HP
D
None of these
3
VITEEE 2024
MCQ (Single Correct Answer)
+1
-0

If $P=\operatorname{cosec} \frac{\pi}{8}+\operatorname{cosec} \frac{2 \pi}{8}+\operatorname{cosec} \frac{3 \pi}{8}$ $+\operatorname{cosec} \frac{13 \pi}{8}+\operatorname{cosec} \frac{14 \pi}{8}+\operatorname{cosec} \frac{15 \pi}{8}$ and $\phi=8 \sin \frac{\pi}{18} \sin \frac{5 \pi}{18} \sin \frac{7 \pi}{18}$, then the value of $P+Q$ is

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

Difference between the maximum and minimum values of $f(x)=-\sin ^3 x+3 \sin ^2 x+5$ in $x \in\left[0, \frac{\pi}{2}\right]$ is

A
2
B
4
C
6
D
7
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