Question Number 166234 by ajfour last updated on 15/Feb/22
$$\:\:\mathrm{sin}^{−\mathrm{1}} \frac{{a}}{\mathrm{2}{R}}+\mathrm{sin}^{−\mathrm{1}} \frac{{b}}{\mathrm{2}{R}}+\mathrm{sin}^{−\mathrm{1}} \frac{{c}}{\mathrm{2}{R}}=\frac{\pi}{\mathrm{4}} \\ $$$${find}\:{R}\:{n}\:{terms}\:{of}\:{a},{b},{c}. \\ $$