Convert between quadrant bearing (N45°E style) and azimuth (0-360° from North).
Convert angles between sexagesimal, decimal, gradians, and radians.
Calculate earthwork volume using the average end area method.
Convert slope between percentage, degrees, and ratio.
Calculate all six trigonometric functions for any angle.
Solve right triangle relations using Euclid's theorems.
Divide a polynomial by (x - r) using synthetic division.
Donaldson R F