1
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

If $\alpha$ is a root of $x^4=1$ with negative principal argument, then the principle argument of $\Delta(A)$, where $\Delta(A)=\left|\begin{array}{ccc}1 & 1 & 1 \\ \alpha^n & \alpha^{n+1} & \alpha^{n+3} \\ \frac{1}{\alpha^{n+1}} & \frac{1}{\alpha^n} & 0\end{array}\right|$

A

$\frac{5 \pi}{4}$

B

$\frac{\pi}{4}$

C

$-\frac{3 \pi}{4}$

D

$-\frac{\pi}{4}$

2
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

Let $f(x)=\cos ^{-1}\left(2 x \sqrt{1-x^2}\right)$, then $f^{\prime}(0.6)$ equals to

A

$\frac{5}{2}$

B

$-\frac{5}{2}$

C

$\frac{2}{5}$

D

$-\frac{2}{5}$

3
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

The period of the function $f(x)=3 \sin \frac{\pi x}{3}+4 \cos \frac{\pi x}{4}$ is

A

23

B

25

C

24

D

34

4
VITEEE 2025
MCQ (Single Correct Answer)
+4
-1

If $f(x)=\left(\frac{x^2+5 x+3}{x^2+x+2}\right)^x$, then $\lim _{x \rightarrow \infty} f(x)$ is

A

$e^4$

B

$e^3$

C

$e^2$

D

$2^4$

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