Question

ВЫЧИСЛИТЕ ПОЖАЛУЙСТА 1) 2SIN π/2 * COS π/8 2)(COS π/12-SINπ/12)*(COSπ/12+SINπ/12)

Answer 1

1) 2Sinπ/8 Cosπ/8= Sin π/4= √2/2

2) = Cos²π/12 - Sin²π /12 = Сosπ/6 = √3/2