Предмет: Математика, автор: rryumka

Найдите cos t, если известно, что sin t = 0,6, а угол t лежит в первой четверти.

Ответы

Автор ответа: Dedagenn

1

Ответ:

cos²a+sin²a=1, cosa=±√(1-0.6²)=±0.8, cosa (1 кв)= +0.8 -ответ

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