Question

sín 20º =.3420 cos 20' = 9396 A sidewalk ramp needs to be pitched at 20°. If the ramp is used to access a 25-inch step to a school, what will be the length of the ramp to the nearest inch? tan 20° = .3639 73 inches 27 inches 9 inches 69 inches

Answer 1

`\begin{gathered} \cos 20=(25)/(h) \\ h=(25)/(\cos 20) \\ h=(25)/(0.9396) \\ h=27\text{ inches} \end{gathered}`