1
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
$\cot \left(\sum\limits_{n=1}^{50} \tan ^{-1}\left(\frac{1}{1+n+n^2}\right)\right)$ is equal to
A
$\frac{26}{25}$
B
$\frac{25}{26}$
C
$\frac{50}{51}$
D
$\frac{52}{51}$
2
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $\sinh x=\frac{\sqrt{21}}{2}$, then $\cosh 2 x+\sinh 2 x$ is equal to

A
$\frac{21}{2}$
B
$\frac{25}{2}$
C
$\frac{23+5 \sqrt{21}}{2}$
D
$\frac{32+5 \sqrt{23}}{2}$
3
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
In a $\triangle A B C$, if $a=13, b=14$ and $c=15$, then $r_1=$
A
$\frac{23}{2}$
B
$\frac{21}{2}$
C
$\frac{25}{2}$
D
$\frac{26}{2}$
4
AP EAPCET 2024 - 22th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

In $a \triangle A B C$ if $r: R: r_2=1: 3: 7$, then $\sin (A+C)+\sin B$ is equal to

A
0
B
$\sqrt{3}$
C
1
D
2
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