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mrhunter913
@mrhunter913
July 2022
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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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Answers & Comments
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