Question

A 9-foot ladder rests against the side

of a wall. The bottom of the ladder is
2 feet from the base of the wall.
Determine the measure of the angle
between the ladder and the ground.
Round to the nearest tenth.

Answer 1

about 77.2°

Explanation:

The figure is omitted--please sketch it.

Make sure your calculator is in degree mode.

`\cos( \alpha ) = (2)/(9)`

`\alpha = {cos}^( - 1) (2)/(9) = 77.2`

77.2 degrees