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