Cos 5pi 6
Issue 1: sin
I suggest drawing a circle. They will help you to solve this problem until you solve it. If you draw the circle of the unit, you will see that cos (5PI / 6 + 2PIN) is the same as cos (5PI / 6) because 2PIN always means z. cos (5PI / 6) knows that the circumference of the unit is (3). 5/2
Tan (5ft / 6 + ftN) is a tan (5ft / 6) or tan (11ft / 6) because they have 3 .5 / 3.
The amount is (3). 5/2 (3) 5/3 = 5 (3) 5/6
