Question 1028892
All you can do is follow the instructions. What is it asking you to do? 
. . . ........... .Sin . . .Tan. . . Cos. . . Cot. . . Sec. . . Csc
>>>>>>>>>>>>
5pi/4 = 3.93 . . 0.069 . . 0.069 . . 0.998 . etc
2pi/3 = 2.09
5pi/6 = 2.61
7pi/4
Let your calculator do the work