In any triangle \[ABC,\frac{\tan \frac{A}{2}-\tan \frac{B}{2}}{\tan \frac{A}{2}+\tan \frac{B}{2}}=\]

In any triangle \[ABC,\frac{\tan \frac{A}{2}-\tan \frac{B}{2}}{\tan \f

1.	In any triangle \[ABC,\frac{\tan \frac{A}{2}-\tan \frac{B}{2}}{\tan \frac{A}{2}+\tan \frac{B}{2}}=\]
A.	\[\frac{a-b}{a+b}\]
B.	\[\frac{a-b}{c}\]
C.	\[\frac{a-b}{a+b+c}\]
D.	\[\frac{c}{a+b}\]
Answer» C. \[\frac{a-b}{a+b+c}\]

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In any triangle \[ABC,\frac{\tan \frac{A}{2}-\tan \frac{B}{2}}{\tan \frac{A}{2}+\tan \frac{B}{2}}=\]

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