Предмет: Геометрия, автор: Анна78546

В треуг. АВС угол С=90°, АВ =25 см, ВС=20см
Найти сosB и tgA

Ответы

Автор ответа: lemon214

0

Решение
по теореме Пифагора:
25*25-20*20=625-400=√225=15
cos A = AC/AB=15/25=0,6
Ответ: 15/25 или 0,6

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