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

If $x \in(-\pi, \pi)$, then the number of solutions of the equation $2 \sin x \sin 3 x \sin 5 x+\sin 5 x \cos 4 x=0$ is

A

14

B

12

C

13

D

9

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

The number of values of $x$ satisfying the equation, $\tan ^{-1}\left(x+\frac{\sqrt{2}}{x}\right)+\tan ^{-1}\left(x-\frac{\sqrt{2}}{x}\right)=\tan ^{-1}(x)$ is

A

0

B

1

C

2

D

3

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

$\cot h^2 x-\tanh ^2 x=$

A

$4 \operatorname{cosech} 2 x \tanh 2 x$

B

$4 \operatorname{sech} 2 x \operatorname{coth} 2 x$

C

$4 \operatorname{sech} 2 x \tanh 2 x$

D

$4 \cosh 2 x(\operatorname{cosech} 2 x)^2$

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

If $a=3, b=5, c=7$ are the sides of a $\triangle A B C$, then its circumradius is

A

$\frac{7}{\sqrt{3}}$

B

$\frac{15}{2}$

C

$\frac{15 \sqrt{3}}{4}$

D

$\frac{\sqrt{3}}{2}$

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