1. (a) Evaluate / cos (2:13) d1? by guessing an antiderivative of cos (230) (b) Find a formula for / cos (/4333) CL? Where k is a nonzero constant. 10 cos3 (5:15) 4cos2 (538) l 1 cos2 (5x) d3: (c) Evaluate / 2. A rock is dropped from the top of a building and hits the ground at a velocity of 72ft / sec. If the acceleration due to gravity is 32ft/sec27 what is the height of the building