### Home > CCA2 > Chapter 7 > Lesson 7.1.6 > Problem 7-90

7-90.

Calculate the value of each expression below. Give an exact measurement, if possible. Each measure is given in radians.

Make sure your calculator is in radian mode.

Since

is related to the angles, this one has an exact answer. Locate it on the unit circle. Notice that it will be a reflection (twice) of . It is in the third quadrant.