Найти tg^2, если 5sin^2a+13cos^2a=6. Created by mrhunter913. algebra-ru

Найти tg^2, если 5sin^2a+13cos^2a=6...

mrhunter913 @mrhunter913

July 2022 1 9 Report

Найти tg^2, если 5sin^2a+13cos^2a=6

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kalbim

Verified answer

Tg^2(a) = sin^2(a) / cos^2(a)
6 = 6sin^2(a) + 6cos^2(a) - основное тригонометрическое тождество
5sin^2(a) + 13cos^2(a) - 6sin^2(a) - 6cos^2(a) = 0
7cos^2(a) = sin^2(a)
tg^2(a) = 7

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na telezhku massoj m dvizhushuyusya so skorostyu v sverhu padaet gruz massa kotoro

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