Предмет: Алгебра, автор: lolitawtf

Решите. Даю 10 баллов

Приложения:

Ответы

Автор ответа: RTA1414

Ответ: 0,4

Объяснение:

ΔАВС: ∠С=90° по условию. Из теоремы Пифагора:

АВ=√(АС²+ВС²)=√((3√21)²+6²)=√(189+36)=√225=15.

sin∠А=ВС:АВ=6:15=2/5=0,4.

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