1
TS EAMCET 2022 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

In $\triangle A B C$, if $a=7, b=8, \tan C=\frac{3 \sqrt{5}}{2}$ and $C$ is an acute angle, then $c=$

A

$\sqrt{145}$

B

5

C

11

D

9

2
TS EAMCET 2022 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

In a $\triangle A B C$, if $\frac{a}{\tan A}=\frac{b}{\tan B}=\frac{c}{\tan C}$, then $\cos ^2 A+\cos ^2 B+\cos ^2 C=$

A

$\sqrt{2}$

B

$\frac{3}{4}$

C

$\frac{\sqrt{3}+1}{2}$

D

$\frac{2 \sqrt{3}-1}{2}$

3
TS EAMCET 2022 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

In $\triangle A B C$, if $a=7, b=10$ and $c=11$, then $\frac{R}{r}=$

A

14

B

77

C

$\frac{24}{11}$

D

$\frac{55}{24}$

4
TS EAMCET 2022 (Online) 20th July Evening Shift
MCQ (Single Correct Answer)
+1
-0

Let $A B C$ be a triangle and $\mathbf{a}, \mathbf{b}$ and $\mathbf{c}$ be the position vectors of $A, B$ and $C$, respectively. Let $D$ divides $B C$ in the ratio $3: 1$ internally and $E$ divides $A D$ in the ratio $4: 1$ internally. Let $B E$ meet $A C$ in $F$. If $E$ divides $B F$ in the ratio $3: 2$ internally, then the position vector of $F$ is

A

$\frac{\mathbf{a}+\mathbf{b}+\mathbf{c}}{3}$

B

$\frac{\mathbf{a}-2 \mathbf{b}+3 \mathbf{c}}{2}$

C

$\frac{\mathbf{a}+2 \mathbf{b}+3 \mathbf{c}}{2}$

D

$\frac{\mathbf{a}-\mathbf{b}+3 \mathbf{c}}{3}$

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