October 2021 0 4 Report
Найдите sin2A, cos2A, tg2A, если: а) sinA = - 3/5 и П < А < 3П/2
б) соsA = 5/13 и 3П/2 < А < 2П
с) tg A = - 3/4 и П/2 < А < П
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