Предмет: Математика, автор: unicornDex666

Упростите выражение СРОЧНО
2cos(a+b)cos(a-b)-1-2sin^2b

Ответы

Автор ответа: Utsiev95
0
очень просто
sina* sinb можно разложить по формуле 1/2(cos(a -b) -cos(a+b))
получается 2 * 1/2 * (cos(a -b) -cos(a+b)) + cos (a+B) = cos(a -b) -cos(a+b) + cos (a+B) = cos(a -b)
Автор ответа: Utsiev95
0
Отметьте мой ответ как лучший пожалуйста =)
Автор ответа: unicornDex666
0
у меня здесь sina* sinb
Автор ответа: unicornDex666
0
у меня нет здесь*
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