Question Number 113841 by deepraj123 last updated on 15/Sep/20
$$\mathrm{In}\:\mathrm{any}\:\bigtriangleup{ABC},\:\:{b}^{\mathrm{2}} \mathrm{sin}\:\mathrm{2}{C}+{c}^{\mathrm{2}} \mathrm{sin}\:\mathrm{2}{B}\:= \\ $$
In-any-ABC-b-2-sin-2C-c-2-sin-2B-