Question

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

Answer 1

cos45= base/length of ladder= 12/l now solve for l

Answer 2

draw a picture



identify the ratio and work from there...

Answer 3

0.707=12/L...therefore L= 12/0.707

Answer 4

cos"45"=(adjecent/hypotynes)=(12/X);then (12/X)=\[(\sqrt{2}/2)\]then "X"=\[12\sqrt{2}\]