tolong bantuannya nomer 16-20 ya

16. 5/12 x 180 = (180 x 5) / 12 = 75°
17. 75 x 1/180 = 75/180 = 5/12
18. 15 x 1/180 = 15/180 = 1/12
19. 5/12 x 180 = (180 x 5) / 12 = 75°
20. Cos(60°) + Tan(45°) x Sin(90°) = 1/2 + 1 x 1 = 1/2 + 1 = 1,5