1
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The coefficient of $x^3$ in the power series expansion of $\frac{1+4 x-3 x^2}{(1+3 x)^3}$ is

A

-27

B

27

C

153

D

-153

2
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $\frac{a x+5}{\left(x^2+b\right)(x+3)}=\frac{x+21}{12\left(x^2+b\right)}+\frac{c}{12(x+3)}$, then $b^2=$

A

$a^3-c$

B

$a^2+c$

C

$a-c$

D

$a+c$

3
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0
If $\alpha, \beta$ are the acute angles such that $\frac{\sin \alpha}{\sin \beta}=\frac{6}{5}$ and $\frac{\cos \alpha}{\cos \beta}=\frac{9}{5 \sqrt{5}}$, then $\sin \alpha=$
A

$\frac{4}{5}$

B

$\frac{3}{5}$

C

$\frac{3}{4}$

D

$\frac{2}{3}$

4
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $2 \sin x-\cos 2 x=1$, then $\left(3-2 \sin ^2 x\right)=$

A

$\sqrt{3}$

B

$-\sqrt{3}$

C

$\sqrt{5}$

D

$-\sqrt{5}$