(1 point) Evaluate the following expressions. Your answer must be an angle -7/2

(1 point) Evaluate the following expressions. Your answer must be an angle 7t/2' < 0 < in radians, written as a multiple of 7r. Note that is already provided in the answer so you simply have to fill in the appropriate multiple. E.g. if the answer is 7r/2 you should enter 1/2 Do not use decimal answers. Write the answer as a fraction or integer. sin-I - cosl cos-l Note: You can earn partial credit on this problem.