+73 Given: The point 
is on the Unit Circle.
Find: (a) the angle θ, in both radians and degrees that contains that point.
(b) sin θ and cos θ.
+36916 Those are x and y coordinates on the unit circle.....they are both negative , so it is in quadrant 3
sin = - 1/2
cos = - sqr3/2
7 pi /6 is 210 degrees
