Johnny is building a ramp to his front door, which is 4.3 feet off the ground. He wants the angle of elevation of the ramp to be 2 degrees. How long will his ramp be?

2 answers

length = 4.3 ft / sin(2º)
4.3/ramp=sin2 deg
now using the small angle approximation
sin2 deg=(2/360) *2PI= 0.034906585
ramp=4.3/.035=123 feet

check my calculations