Solve these problems on paper and show every step taken

Use the given information to find the exact value of the trigonometric function. 45) sec 0 = 4, 0 lies in quadrant I Find cos 2 45) A) V10 B) 18 + 2 15 D) V8 - 215 4 4 Convert the angle in degrees to radians. Express answer as a multiple of n. 46) 135 46) 47 A) 3 radians B) A - radians c) 7 7 radians D) - radians Find the length of the arc on a circle of radius r intercepted by a central angle 0. Round answer to two decimal places. 47) r = 55 inches, 0 = 20 47) A) 17.35 inches B) 21.63 inches C) 19.2 inches D) 20.49 inches Solve the problem. 48) A pendulum swings through an angle of 20 each second. If the pendulum is 35 inches long, how 48) far does its tip move each second? If necessary, round the answer to two decimal places. A) 14.65 inches B) 12.22 inches C) 10.37 inches D) 13.51 inches Express the angular speed in radians per second. 49) 168 revolutions per second 49) A) 3367t radians per second B) 336 radians per second C) 168 radians per second D) 168n radians per second