Posted by Mars on Tuesday, October 5, 2010 at 12:09am.
Find the reference number and the terminal point determined by t.
a. t =  7(pi)/6

Trig  Henry, Wednesday, October 6, 2010 at 9:45pm
t = 7(pi)/6.
7(pi)/6 * 180/(pi) = 210 deg.
210 is 210 deg CW from the + xaxis
and is in the 2nd quadrant.
Ar = [210]  180,
Ar = 210  180 = 30 deg.
A = 180  30 = 150 DEG CW FROM +X AXIS.