(b) use the your rewglts of part (a) to caloylate the exact valus of the following, (eave radicals, if any, in your anewers)s cos t sin e sin u tan s tan u 3. a farris whoel has radius 35 foet and it rotates at 1.4 revolutions per miute. (a) calculate its anrular speed in radians per minute. (b) calculate the linear speed of a point cn its rim in feet per minute. 4. the radius of each tire of a pick-up truck is 20 inches. it is moving at a speed of 72 miles per hour. (a) calculate its speed in inches per second. (b) calculate the angular speed of its tires in radians per second. (hint: make use of the linear speed in part (a) and the radius of the tires), (c) how many revolutions are the tires turning per second? round off to the nearest whole mumber. 2