Реши:

1)  \(\cos 35^{\circ} \cdot \cos 10^{\circ} - \sin 35^{\circ} \cdot \sin 10^{\circ}\);

2)  \(\sin 45^\circ \cdot \cos 15^\circ + \cos 45^\circ \cdot \sin 15^\circ\).

• \(1) \, \, \, \, \, \frac{1}{2} \, , \, \, \, \, \, \, \, \, \, 2) \,\, \, \frac{\sqrt{3}}{2} \, \, \,\)
• \(1) \frac{\sqrt{3}}{2}, \qquad 2) \frac{1}{2}\)
• \(1) \,\,\,\,\frac{\sqrt{2}}{2}\, , \,\,\,\,\,\,\,\,\, 2) \,\,\,\,\frac{\sqrt{3}}{2}\, \)
• \(1) \frac{\sqrt{2}}{2} , 2) \frac{\sqrt{2}}{2}\)