Предмет: Математика, автор: JamshidAziz

tgx=2 cosx=? (0<x<90)__________

Ответы

Автор ответа: s59

tgx=2
sinx=2cosx
(sinx)^2+(cosx)^2=5(cosx)^2=1
cosx=1/sqrt(5)
sqrt-квадратный корень

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