Two concentric circles of radii 15 cm and 13 cm are given. Find the length of the chord of the larger circle which touches the smaller circle.
22 \(\sqrt{7}\)
8 \(\sqrt{14}\)
4 \(\sqrt{14}\)
12 \(\sqrt{7}\)
If tan \( \frac{A}{2} \) = x, then find x
\(
\frac{\sqrt{1 + \cos A}}{\sqrt{1 - \cos A}}
\)
\(
\frac{\sqrt{1 - \sin A}}{\sqrt{1 + \cos A}}
\)
\(
\frac{\sqrt{1 - \cos A}}{\sqrt{1 + \cos A}}
\)
\(
\frac{\sqrt{\cos A - 1}}{\sqrt{1 + \cos A}}
\)
General English
Select the most appropriate option that can substitute the underlined word in the given sentence.
Last week's rain ravaged the whole city.
Select the most appropriate option that can substitute the underlined segment in the given semence.
National development is defined as an improvement in people's daily arrangements, the provision of fundamental necessities to citizens such as food, education, social services, medical help, and so on, as well as an increase in per capita income.
diving techniques
dining categories
existing calamities
living conditions