Class 11MathematicsTrigonometrical EquationsRelation between sides and angles, Solutions of triangles
MediumIf $a, b, c$ are the sides and $A, B, C$ are the angles of a triangle $ABC$,then $\tan \left( \frac{A}{2} \right)$ is equal to
- A$\sqrt{\frac{(s - b)(s - c)}{s(s - a)}}$
- B$\sqrt{\frac{(s - b)(s - c)}{s(s - a)}}$
- C$\sqrt{\frac{(s - a)(s - b)}{s(s - c)}}$
- D$\sqrt{\frac{s(s - a)}{(s - b)(s - c)}}$
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