NOTE: Show all your work. Answers without any justification may get no credit. Your answers should be exact, unless specified otherwise. 1. Find the exact value of the expression. (a] cos (cost' ( -? ) ) (b) cos - 1/ COS Hint: When a trig function is OUTSIDE, they always cancel, when an inverse is outside they don't always cancel, only if the given angle is in the appropriate interval (quadrant). 2. Find the exact value of the expression. sins ( cost (-3) )