Автор - dimakrukov599

Спростіть вираз
sin^4a + sin^2a * cos^2a - sin^2a +1

Ответ

Автор - iadaun608

(Sin^4а+sin^2а•cos^2а)-sin^2а+1=sin^2а(sin^2а+cos^2а)-sin^2а+1=sin^2а-sin^2а+1=1

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