Science:Math Exam Resources/Courses/MATH110/December 2013/Question 05 (a)/Hint 1

We evaluate these values by following three steps:

1. Reduce the parameter to be in the interval $[0,2\pi )$.
2. Apply the relevant special triangle, in this case
   
3. Check the sign of the result by remembering the $\cos(t)$ gives the $x$-coordinate and $\sin(t)$ gives the $y$-coordinate.