Задание
Соедини верные равенства
| \({ctg (\alpha-\beta)}\) | \({\dfrac{tg \alpha - tg \beta}{1+tg\alpha tg\beta}}\) |
| \({tg (\alpha + \beta)}\) | \({\dfrac{ctg\alpha ctg\beta-1}{ctg\alpha+ctg\beta}}\) |
| \({sin (\alpha - \beta)}\) | \({cos\alpha cos\beta+sin\alpha sin\beta}\) |
| \({cos (\alpha-\beta)} \) | \({sin \alpha cos\beta-cos\alpha sin\beta}\) |