Решение:
- \( \sin(60^{\circ}) - \operatorname{tg}(120^{\circ}) = \frac{\sqrt{3}}{2} - \operatorname{tg}(180^{\circ} - 60^{\circ}) = \frac{\sqrt{3}}{2} - (-\operatorname{tg}(60^{\circ})) = \frac{\sqrt{3}}{2} - (-\sqrt{3}) = \frac{\sqrt{3}}{2} + \sqrt{3} = \frac{3\sqrt{3}}{2} \)
- \( \operatorname{tg}(45^{\circ}) \cdot \sin(60^{\circ}) \cdot \operatorname{ctg}(30^{\circ}) = 1 \cdot \frac{\sqrt{3}}{2} \cdot \sqrt{3} = \frac{3}{2} \)
Ответ: 21) 3√3/2; 22) 3/2.