18sin40⁰×cos40⁰/sin80⁰=
Ответ
9
18Sin40*Cos40/Sin80 = 9(2Sin40Cos40)/Sin80 = 9Sin80/Sin80 = 9
Ответ
15
18Sin40 × Cos40/Sin80 = 9 (2Sin40Cos40)/Sin80 = 9Sin80 / Sin80 = 9