Traffic sign

There is a traffic sign for climbing on the road with an angle of 7%. Calculate at what angle the road rises (falls).

Correct result:

A =  4.0042 °
B =  4.014 °

Solution:

r=7%=7100=0.07  tanA=yx=r  A=180πarctan(r)=180πarctan(0.07)=4.0042=415"
r=y/a a=1 m y1=a r=1 0.07=7100=0.07 m x1=a2y12=120.0720.9975 m  B=180πarctan(y1x1)=180πarctan(0.070.9975)4.014=4.014=450"  BA



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