18sin40⁰×cos40⁰/sin80⁰=

Question

18sin40⁰×cos40⁰/sin80⁰=

Answer 1

18Sin40*Cos40/Sin80 = 9(2Sin40Cos40)/Sin80 = 9Sin80/Sin80 = 9

Answer 2

18Sin40 × Cos40/Sin80 = 9 (2Sin40Cos40)/Sin80 = 9Sin80 / Sin80 = 9