Class 11MathematicsTrigonometrical EquationsRelation between sides and angles, Solutions of triangles
EasyIf $\tan \frac{B - C}{2} = x \cot \frac{A}{2},$ then $x = $
- A$\frac{c - a}{c + a}$
- B$\frac{a - b}{a + b}$
- C$\frac{b - c}{b + c}$
- DNone of these
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Easy
View SolutionIn a $\triangle ABC$,if $3a = b + c$,then $\cot \frac{B}{2} \cot \frac{C}{2} =$
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