All these questions require is a calculator :). For question 35, all you want to put in is arccos(0.8192) and make sure your calculator is in degree mode. For 36, all you want to put in is arctan(0.3839). For 34, all you want to put in is arcsin(0.6018). For 33, all you want to put in is arcsin(0.6561).
Original position was let's say 40 yard line. You must get to the 50 yard line for a first down. Losing 26 1/3 yardage, you are at the 13 2/3 location You would need (36 1/3) to get to the 50 yard line.
