Question

A ramp has a height of 5.8 feet and an angle of 80°. (is a right triangle. above the 90 degree angle is the 80 degree angle)

What is the length of the ramp, y, to the nearest tenth of a foot?

Answer 1

Since your side of 5.8 is adjacent to the 80° and you want the hypotenuse ...
cos80 = 5.8/h
h = 5.8 / cos80 = appr. 33.4