Question

35 БАЛЛОВ
Решите задачу НА ЛИСТОЧКЕ

Answer 1

$\frac{\sin 100^{\circ}\cdot \cos 40^{\circ}-\cos 100^{\circ}\cdot \sin 40^{\circ}}{2\sin 15^{\circ}\cdot \cos 15^{\circ}}=\frac{\sin(100^{\circ}-40^{\circ})}{\sin 30^{\circ}}=\frac{\sin 60^{\circ}}{\sin 30^{\circ}}=\frac{2\sin 30^{\circ}\cdot \cos 30^{\circ}}{\sin 30^{\circ}}=2\cos 30^{\circ}$

Ответ: 2 cos 30°

Answer 2

Ответ:

√3

Объяснение:

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