Предмет: Алгебра, автор: balet2001

Поможете?Выберу лучшим.Прошу помогите.
Найдите значения выражения Sin(π/4+х)+2Sin(π/4-х)+4Cosх+2Cos*(х+3π/4)
при:
1)х=π/4; -дробь.
2)х=3π/4. -дробь.

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Автор ответа: Аноним
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