Задание
В треугольнике \(\displaystyle ABC{\small:}\)
- \(\displaystyle AC=b\small,\)
- \(\displaystyle \angle A=\alpha\) и \(\displaystyle \angle C=\gamma\small.\)
Выразите биссектрису \(\displaystyle BL\) через \(\displaystyle \alpha,\,\gamma\) и \(\displaystyle b{\small:}\)
\(\displaystyle BL=\) [ ]