1
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

If $A=\left[\begin{array}{ll}1 & 2 \\ 3 & 4\end{array}\right]$, then $\operatorname{adj}(\operatorname{adj}(\operatorname{adj} A))$

A

$A$

B

$A^{-1}$

C

$|A| A^{-1}$

D

$\frac{A^{-1}}{|A|}$

2
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The sum of all the roots of the equation

$\left|\begin{array}{ccc}x & -3 & 2 \\ -1 & -2 & (x-1) \\ 1 & (x-2) & 3\end{array}\right|=0$ is

A

13

B

3

C

2

D

7

3
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

One of the values of $\sqrt{24-70 i}+\sqrt{-24+70 i}$ is

A

$2+12 i$

B

$12-2 i$

C

$-12+2 i$

D

$-12-2 i$

4
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The set of all values of $\theta$ such that $\frac{1-i \cos \theta}{1+2 i \sin \theta}$ is purely imaginary is

A

$\left\{n \pi+(-1)^n \frac{\pi}{4}, n \in z\right\}$

B

$\left\{\frac{n \pi}{2}+(-1)^n \frac{\pi}{4}, n \in z\right\}$

C

$\left\{n \pi+(-1)^n \frac{\pi}{2}, n \in z\right\}$

D

$\left\{2 n \pi \pm \frac{\pi}{4}, n \in z\right\}$

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