Предмет: Геометрия, автор: Haklik

Дано косинус 1/3 найти синус альфа тангенсальфа

Ответы

Автор ответа: Gwaeron

А есть ли варианты ответов?

Автор ответа: Lina595

Cos²альфа+Sin²альфа=1

(1/3)² + Sin²=1

Sin²=1-1/9

Sin²=8/9

Sin=(под корнем 8/9)

Sin=корень из 8 дробная черта 3

tg=Sin альфа/Cos альфа

tg=√8/3 : 1/3

tg=√8×3 дробная черта 3×1

tg=√8

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