Предмет: Математика, автор: MaxBakki

Упростить:
(m sin a + ncos a)^{2} + (m cos a -n sin a)^{2}
Заранее, огромное спасибо!

Ответы

Автор ответа: IrkaShevko
1

Ответ:

Пошаговое объяснение:

m^2sin^2a+n^2cos^2a+2mnsinacosa+m^2cos^2a+n^2sin^2a-2mnsinacosa=\\\\=m^2(sin^2a+cos^2a)+n^2(sin^2a+cos^2a)=m^2+n^2

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