Предмет: Геометрия, автор: Алинамими

Вычислите cos a, tg a, если sin a = 3/5.

Ответы

Автор ответа: 14ОтЛиЧнИк88

sin^2 a +cos^2 a = 1
cos a= √( 1- (3/5)^2 )= √16/25= 4/5
tg a= sin a/ cos a
tg a= 3/5 : 4/5 = 3/4

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