1. Evaluate each expression. Give your answer in radians: . ' ' 1 I. Without usmg a calculator: cos 1 (- E) = ii. Use a calculator: sin1(0.312) = iii. Without using a calculator: tam1 (g) = 2. Without using a calculator, find the exact value of each: i. sin1(sin(%n)) = ii. cos1(cos(117n)) = iii. cos(cos'1(%)) = iv. sin(tan'1()) = 3. A 16-foot ladder leans up against the side of a building so that the foot of the ladder is 6 feet from the base of the building. If specifications call for the ladder's angle of elevation to be between 35 and 45 degrees, does the placement of this ladder satisfy the safety specifications