Trigonometry Answers

Let cos x = .28 and cos y = .74. Which is x – y?

A. cos^(–1).28 + cos^(–1).74
B. –cos^(–1).28 – cos^(–1).74
C. cos^(–1).28 – cos^(–1).74
D. –cos^(–1).28 + cos&(–1).74

Let sin m = .11. Which of the following is sin m/2?

A. 0.79
B. 0.78
C. 0.77
D. 0.05

Let sin m = .11. Which of the following is sin m/2?

if a 21 inches diameter pulley that is being driven by an electric motor abd running at 1600 revolution per minutes is connected by belt to a 5 inch diameter pulley to drive a saw. what is the speed of the saw in revolution per minutes?

How fast is a bicyclist traveling in miles per hour if his tires are 27 inches in diameter and his angular speed is 5 pie radius per seconds

A surveyor stands at point A, which is due south of a tower OT of height h m. The angle of elevation of the top of the tower from A is 45 degrees. The surveyor then walks 100 m due east to point B, from where she measures the angle of elevation of the top of the tower to be 30 degrees.

P.S the answer says that the bearing is 130 degrees.

PLEASE PLEAS HELP ME I am really struggling to figure out how...