Предмет: Алгебра, автор: dapha9i

Решите пожалуйста уравнение cos^2x-sin^2x=0

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Автор ответа: nKrynka

cos^2x - sin^2x = 0
cos2x = 0
2x = π/2 + π n, n∈Z
x = π/4 + (π n)/2, n∈Z

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