Автор - Вика20132014

Представь в виде произведения cosπ/6+cosπ/2

Ответ

Автор - 5tgb03

cosπ/6+cosπ/2 = 2 * cos ( π/6+π/2 )/2 * cos ( π/6-π/2 )/2 =

= 2 * cos ( π/3 ) * cos ( -π/6 )




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