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 answer:

A =  4.0042 °
B =  4.014 °

Step-by-step explanation:

r=7%=1007=0.07  tanA=xy=r  A=π180°arctanr=π180°arctan0.07=4.0042=4°15"
r=y/a a=1 m y1=a r=1 0.07=1007=0.07 m x1=a2y12=120.0720.9975 m  B=π180°arctan(x1y1)=π180°arctan(0.99750.07)4.014  BA

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