1
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0
  1. If $\frac{x^2+7}{\left(x^2+1\right)(x-2)}=\frac{A}{x-2}+\frac{B x+C}{x^2+1}$, then the determinant of the matrix $\left[\begin{array}{ll}A & B \\ C & \frac{2}{5}\end{array}\right]$ is

A

5

B

-5

C

$94 / 25$

D

-2

2
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $\tan 15^{\circ}$ and $\tan 30^{\circ}$ are the roots of equation $x^2+p x+q=0$, then $p q=$

A

$\frac{6 \sqrt{3}+10}{\sqrt{3}}$

B

$\frac{10-6 \sqrt{3}}{3}$

C

$\frac{10+6 \sqrt{3}}{3}$

D

$\frac{10-6 \sqrt{3}}{\sqrt{3}}$

3
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $\cos x+\cos y=p, \sin x+\sin y=q$, then $\cos \left(\frac{x-y}{2}\right)=$

A

$\pm \frac{\sqrt{p^2+q^2}}{2}$

B

$\pm \frac{p q}{2}$

C

$\pm\left(\frac{p+q}{2}\right)$

D

$\pm \frac{\sqrt{p^2+q^2}}{4}$

4
TS EAMCET 2022 (Online) 18th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $A+B+C=\frac{3 \pi}{2}$, then $4 \sin A \sin B \sin C+\cos 2 A+\cos 2 B+\cos 2 C=$

A

$-\sin (A+B+C)$

B

$\cos (A+B+C)$

C

$\sin (A+B+C)$

D

$2-\cos (A+B+C)$

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