Предмет: Алгебра, автор: famano99

ТЕРМІНОВО. потрібне рішення

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Автор ответа: dobra888

0

Відповідь: sin4φ .

Пояснення:

sinφcos3φ + cosφsin3φ = sin( φ + 3φ ) = sin4φ . ( за формулою

синуса суми двох кутів ) .

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