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  • https://math.libretexts.org/Courses/Borough_of_Manhattan_Community_College/MAT_206.5/07%3A_Periodic_Functions/7.04%3A_Inverse_Trigonometric_Functions/7.4E%3A_Exercises
    60) What percentage grade should a road have if the angle of elevation of the road is 4 degrees? (The percentage grade is defined as the change in the altitude of the road over a 100-foot hori...60) What percentage grade should a road have if the angle of elevation of the road is 4 degrees? (The percentage grade is defined as the change in the altitude of the road over a 100-foot horizontal distance.

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