9.1B  Evaluating Trig Functions

 Given:

      Point P is located in QIII and the x-coordinate is -¼.

 Find

    The 6 Trig Functions of Angles.

       You are given a coordinate x (not a function) and need to find y.

       Use the Circle Formula:   x2 + y2 = 1   

       The reason you are using the Circle Formula is that you are given only the x-coordinate.  

       The Circle Formula will help you find the y-coordinate.