Class 11MathematicsTrigonometrical EquationsRelation between sides and angles, Solutions of triangles
MediumThe sum of the radii of the inscribed and circumscribed circles for an $n$-sided regular polygon of side $a$ is:
- A$a \cot \left( \frac{\pi}{n} \right)$
- B$\frac{a}{2} \cot \left( \frac{\pi}{2n} \right)$
- C$a \cot \left( \frac{\pi}{2n} \right)$
- D$\frac{a}{2} \cot \left( \frac{\pi}{n} \right)$
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