To determine the minimum coefficient of static friction on a 19-degree incline, the correct approach involves using the tangent function. The user initially calculated the normal force and static friction incorrectly, leading to an erroneous answer of 0.15. It was pointed out that the gravitational acceleration (9.8 m/s²) should not be included in the coefficient calculation. The correct calculation involves simply using the tangent of the angle, tan(19), without additional factors. The discussion emphasizes the importance of ensuring the calculator is set to the correct mode for angle measurement.