A 20 ft ladder is placed next to a building. The ladder forms a 72° angle with the ground. How far is base of the ladder from the base of the building? Round your answer to the nearest tenth of a foot. Show your work.
The ladder is the hypotenuse of a right triangle
20 cos (72) = 6.18 ft ~~ 6.2 ft
Imagine a right triangle: We have adjacent/hypotenuse, so 20 cos 72 approx 6.2! Like what EP had said!