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

$\begin{gathered} \cos 20=\frac{25}{h} \\ h=\frac{25}{\cos 20} \\ h=\frac{25}{0.9396} \\ h=27\text{ inches} \end{gathered}$