Find sin t and cos t for the given value of t.
t = −120°
t = -120 = - 2pi / 3
Sin and cos will be negative (quadrant III)
Cos = - 1/2 (or 0.5)
Sin = - sqrt3/2 (or - 0. 866)
sin(t)=-0.580611184
cos(t)=0.814180971
+36916 +36916 
