Question

A 7-foot ladder is leaned against a building in such a way that the bottom of the ladder is 4 feet from the base of the wall. Find the angle formed between the ladder and the ground.

Answer 1

Using the cos:

cos (angle formed) = (Adjacent Side) / (Hypotenuse side)
Adjacent Side = Distance from ladder to wall = 4
Hypotenuse side = Length of ladder

cos (angle) = 4 / 7
(angle) = cosh (4/7)=55
* cosh = cos^-1