Вычислите(подробно - полное решение) cos(-α), если cos α=0.08 sin α, если sin(-α...

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August 2022 1 14 Report

Вычислите(подробно - полное решение)
cos(-α), если cos α=0.08
sin α, если sin(-α)=0.21
tan α, если tan(-α)=-4

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NNNLLL54

Verified answer

Воспользуемся чётностью функции cosa и нечётностью функций sina и tga .

$cosa=0,08\; \; ,\; \; \; cos(-a)=cosa=0,08\; \; \to \; \; cosa=0,08\\\\sin(-a)=0,21\; \; ,\; \; \; sin(-a)=-sina=-0,21\; \; \to \; \; sina=0,21\\\\tg(-a)=-4\; \; ,\; \; tg(-a)=-tga=-4\; \; \to \; \; \; tga=4$

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y2 y esli ylt 2

A verb which mean to think about the past B verb which mean to return or to ret...

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