how do you find the exact function value of sec120. I know how to find it for 0, 30, 60 or 90, but not an strange number like 120.
120 degrees is a 60 degree reference angle in quadrant 2.....
It will have the same value as the the secant of 60 except that, since x is negative in this quadrant.....the secant will be negative, too....
Can you take it from there??
