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

$$ \frac{e^{4 x}+e^{-4 x}+14}{4\left(e^x-e^{-x}\right)^2}= $$

A

$\sinh ^2 x+\operatorname{coth}^2 x$

B

$\sinh ^2 x+\operatorname{sech}^2 x$

C

$\cosh ^2 x+\operatorname{sech}^2 x$

D

$\cosh ^2 x+\tanh ^2 x$

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

If $\tanh x=\frac{1}{2}$, then $\sinh 2 x-\operatorname{sech} 2 x=$

A

$\frac{29}{15}$

B

$\frac{11}{15}$

C

3

D

$\frac{-13}{15}$

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

In $\triangle A B C$, if $A$ is acute, $C$ is obtuse, $\sin A=\frac{3 \sqrt{3}}{14}, a=3$ and $b=5$, then $c=$

A

$16 / 7$

B

7

C

$14 / 3$

D

6

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

If $\Delta$ denotes the area of $\triangle A B C$, then $(b \sin C+c \sin B)(b \cos C+c \cos B)=$

A

$a b \cos C$

B

$2 \Delta$

C

$b c \cos A$

D

$4 \Delta$

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