1
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

$$ \text { Match the items of List-I to the items of List-II } $$

$$
\text { List-I }
$$
$$
\text { List-II }
$$
A. The period of $\sin ^2 x$ is I. $$
\frac{2 \pi}{3}
$$
B. $$
\begin{aligned}
&\text { Maximum value of }\\
&\frac{\pi}{3}(\sqrt{3} \cos 3 x+\sin 3 x)
\end{aligned}
$$
II. $$
12 \pi
$$
C. The period of $\sin \frac{x}{3}+\cos \frac{x}{2}$ is III. $$
\frac{\pi}{2}
$$
D. Intersection points of $y=|\sin x|$ and $y=1$ in $(0, \pi)$ IV. $$
\frac{3\pi}{2}
$$
V $$
\pi
$$

$$ \text { The correct match is } $$

A
A B C D
V I II III
B
A B C D
IV I II III
C
A B C D
III I IV V
D
A B C D
IV III II V
2
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $\cot \left(\frac{A}{2}\right)=\sqrt{\frac{1+a}{1-a}} \cdot \cot \left(\frac{\theta}{2}\right)$, then $\cos \theta=$

A

$\frac{(\cos A)+a}{1-a \cos A}$

B

$\frac{(\cos A)-a}{1-a \cos A}$

C

$\frac{(\cos A)-a}{1+a \cos A}$

D

$\frac{(\cos A)+a}{1+a \cos A}$

3
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

If $\sum\limits_{n=1}^k \tan ^{-1}\left(\frac{1}{n^2+3 n+3}\right)=\tan ^{-1} \alpha$, then $\alpha=$

A

$\frac{k}{k+2}$

B

$\frac{2 k}{2 k+1}$

C

$\frac{k}{2 k+5}$

D

$\frac{3 k}{4 k+5}$

4
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The set of values of $x$ such that $\tan ^{-1}\left(\frac{x}{x-2}\right)-\tan ^{-1}\left(\frac{x}{2 x-1}\right)=\tan ^{-1}\left(\frac{2}{3}\right)$ is

A

$\phi$

B

$\left\{\frac{1}{2}\right\}$

C

$\left\{\frac{1}{3}, 2\right\}$

D

$\left\{\frac{1}{3}, 4\right\}$

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