1) Determine measure of least positive angle which is coterminal with angle given. Then determine measure of negative angle which is nearest to and is coterminal with angle given. Given angle : -145'
2) convert angle 74.22' to D'M'S''
3) use the calculator and given trigonometric ratio for sin to compute indicated trigonometric ratio for for sec, in radians. sin α=0.4747, sec α= ?
4) Angle of inclination from base of skyscraper A to top of skyscraper B is about 14.6 degrees. If skyscraper B is 1478 feet tall, how far apart are two skyscraper? Suppose bases of two building are at same elevation.