Question

sin 75 градусов + sin 15 градусов

Answer 1

0.96+ 0.25= 1.21
удачи)

Answer 2

По формуле:
$sin\alpha + sin\beta = 2 \sin \frac{\alpha+\beta}{2}\cdot cos \frac{\alpha-\beta}{2}$
$sin75^{\circ} + sin15^{\circ} = 2 \sin \frac{75^{\circ}+15^{\circ}}{2}\cdot cos \frac{75^{\circ}-15^{\circ}}{2} = 2sin45^{\circ}\cdot cos30^{\circ} = \\ = 2 \cdot \frac{ \sqrt{2} }{2} \cdot \frac{ \sqrt{3} }{2} = \sqrt{2} \cdot \frac{ \sqrt{3} }{2} = \frac{ \sqrt{6} }{2}$