trigonometry

Question: In any triangle $ABC,\frac{\tan \frac{A}{2}-\tan \frac{B}{2}}{\tan \frac{A}{2}+\tan \frac{B}{2}}=$

1) $\frac{a-b}{a+b}$

2) $\frac{a-b}{c}$

3) $\frac{a-b}{a+b+c}$

4) $\frac{c}{a+b}$

Solution:

Explanation: No Explanation

Relation between sides and angles Solutions of triangles

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