MODERATE EXERCISES

(1)  Find the value of the trigonometric functions.

 (a) sin 120o

 (b) cos 135o

 (c) sin 240o

 (d) cos 330o

 (e) sin 150o

 NOTE you might want to look at example 2 in the summary part of this section.

 (a) sin 120o = /2

 (b) cos 135o = -/2

 (c) sin 240o = -/2

 (d) cos 330o = /2

 (e) sin 150o = 1/2