1
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The number of solution of $\tan ^{-1} 1+\frac{1}{2} \cos ^{-1} x^2-\tan ^{-1} \left(\frac{\sqrt{1+x^2}+\sqrt{1-x^2}}{\sqrt{1+x^2}-\sqrt{1-x^2}}\right)=0$ is

A

3

B

0

C

1

D

infinitely many

2
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

$$ \tanh ^{-1}(\sin \theta)= $$

A

$\sinh ^{-1}(\operatorname{cosec} \theta)$

B

$\sinh ^{-1}(\sec \theta)$

C

$\cosh ^{-1}(\operatorname{cosec} \theta)$

D

$\cosh ^{-1}(\sec \theta)$

3
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In $\triangle A B C$, if $a=8, b=10, c=12$, then $\frac{r}{R}=$

A

$\frac{8}{15}$

B

$\frac{7}{16}$

C

$\frac{3}{5}$

D

$\frac{5}{8}$

4
AP EAPCET 2025 - 23rd May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In $\triangle A B C$, if $a=13, b=8, c=7$, then $\cos (B+C)=$

A
$\frac{11}{13}$
B
$\frac{23}{26}$
C
$\frac{3}{4}$
D
$\frac{1}{2}$