Перейти к выбору ответа 11.04.2022Используя тождество sin^2a+cos^2a=1 Упростите выражение 1)Sin^4a+2sin^2a cos^2a+cos^4a 2)cos^2a-cos^4a+sin^4a Выбрать другой вопрос Смотреть ответ Перейти к выбору ответа Алгебра Ответ учителя по предмету Алгебра 1) (sin^2a+cos^2a)^2 = 1^2 = 1 2) cos^2a(1-cos^2a) + sin^4a = cos^2a*sin^2a + sin^4a = sin^2a(cos^2a + sin^2a) = sin^2a
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а)28b^6 •c^5
c^3 84b^6