Предмет: Алгебра, автор: Unicorn7

2Cos2x как это можно заменить?

Ответы

Автор ответа: o1l7eg17
3
2cos(2x)=2cos^2(x)-2sin^2(x)
или
4sin(\frac{\pi}{4}-x)sin(x+\frac{\pi}{4})
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