Предмет: Математика, автор: qevest

Пожалуйста помогите мне

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Автор ответа: Simba2017
0

sin^2x+cos^2x=0

cos^2x=1-sin^2x=1-0.36=0.64

cosx=0.8

tgx=sinx/cosx=0.6/0.8=0.75

ctgx=cosx/sinx=0.8/0.6=4/3

в первой координатной четверти все значения положительны

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