The angle of elevation of a ladder leaning against a wall is 45°. If the distance from the base of the ladder to the wall is 12 feet, how long is the ladder?

Question

anonymous · Answer

cos 45 degrees = 12/h where h is the length of the ladder
h = 12/cos 45 = 16.97 feet

anonymous · Answer

you have the angle against the wall (45) and the length of the hypotenuse (25ft) and you want to find the adajcent side. so for this we need to use 'cos' (CAH = cos(angle) =adjacent/hypotenuse)
therefore:

cos(45)=?/25
rearrange to get 25cos(45)=?
type into calculator to get 16.73 fee