Question : The value of $\sqrt{11+2 \sqrt{18}}$ is closest to:

Option 1: 4.8

Option 2: 4.4

Option 3: 3.8

Option 4: 4.1

Question : The value of $\frac{1}{\sqrt{7-4 \sqrt{3}}}$ is closest to:

Option 1: 1.2

Option 2: 4.1

Option 3: 4.2

Option 4: 3.7

Question : The value of $\sqrt{9-2 \sqrt{11-6 \sqrt{2}}}$ is closest to:

Option 1: 2.7

Option 2: 2.9

Option 3: 2.4

Option 4: 2.1

Question : The value of $\frac{1}{\sqrt{17+12 \sqrt{2}}}$ is closest to _____.

Option 1: 1.4

Option 2: 1.2

Option 3: 0.14

Option 4: 0.17

Question : The value of $\frac{1}{\sqrt{17+12 \sqrt{2}}}$ is closest to ______.

Option 1: 1.4

Option 2: 1.2

Option 3: 0.14

Option 4: 0.17

Question : If $\cos A=\frac{1}{11}$, then find the value of cot A.

Option 1: $\frac{2 \sqrt{30}}{11}$

Option 2: $2 \sqrt{30}$

Option 3: $\frac{1}{2 \sqrt{30}}$

Option 4: $\frac{11}{2 \sqrt{30}}$