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

If $\frac{1}{2} \sin ^{-1}\left(\frac{3 \sin 2 \theta}{5+4 \cos 2 \theta}\right)=\tan ^{-1} x$, then $x=$

A

$\tan \frac{\theta}{3}$

B

$\frac{1}{3} \tan \theta$

C

$\tan 3 \theta$

D

$\frac{1}{3} \tan 3 \theta$

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

If $\operatorname{sech}^{-1} x=\log 2$ and $\operatorname{cosech}^{-1} y=-\log 3$, then $(x+y)=$

A

$\frac{1}{6}$

B

$\frac{1}{20}$

C

6

D

20

3
AP EAPCET 2025 - 22nd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If the sides $a, b, c$ of the $\triangle A B C$ are in harmonic progression, then $\operatorname{cosec}^2 A / 2, \operatorname{cosec}^2 B / 2, \operatorname{cosec}^2 C / 2$ are in

A

Arithmetico-geometric progression

B

Arithmetic progression

C

Geometric progression

D

Harmonic progression

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

In $\triangle A B C$, if $r=3$ and $R=5$, then $\frac{1}{a b}+\frac{1}{b c}+\frac{1}{c a}=$

A

$\frac{1}{30}$

B

$\frac{12}{15}$

C

$\frac{1}{15}$

D

$\frac{5}{36}$