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The math library provides a number of useful math functions as well as special functions for plane-angle conversions, digests, trigonometry, and great-circle calculations. More are added as needed. 

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power(<num1>,<num1>) - <num1> to the <num2>th power.

 n = math:power(2,3);    //  n = 8

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ceiling(<num>) - the smallest integer not less than <num>

n = math:ceiling(2.78);    // n = 3

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floor(<num>) - the largest integer not greater than <num>

n = math:floor(2.78);    // n = 2

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round(<num> - convert <num> to the nearest integer.

n = math:round(2.1);    // n = 2
m = math:round(2.7);    // n = 3

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Plane Angle Conversions

deg2rad

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// using the same co-ordinates as the great distance example
// find waypoint 3/4ths of the distance along the great circle
b = math:great_circle_waypoint(rlnga,r90 - rlata, rlngb,r90 - rlatb,.75);
lng = b[0];
lat = b[1];

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