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Approximately 4.57 degrees

If you mean what degree angle yields an 8% grade, then you would solve the problem as follows:

Construct a right triangle with one leg equal to 8 (the leg opposite the angle whose measurement you are trying to find) and the other leg equal to 100. The grade of the incline is then 8/100=8%. If the measure of the angle is theta, then tan(theta)=8/100, and theta=arctan(8/100), or approximately 4.57 degrees

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15y ago

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