3. Вычислить: sin 105°

sin(105°) = sin(60° + 45°) = sin(60°)cos(45°) + cos(60°)sin(45°) = ((\frac{\sqrt{3}}{2})(\frac{\sqrt{2}}{2}) + (\frac{1}{2})(\frac{\sqrt{2}}{2}) = \frac{\sqrt{6} + \sqrt{2}}{4} = \frac{\sqrt{2}(\sqrt{3}+1)}{4}\) Ответ: B) √2(√3+1) / 4