SEC

Returns the secant of its argument

Implemented by: ansifull, bw32

With variations:

Also written as:

The formula 1/COS(X) is the easy substitute of SEC in BASICs that don't implement it, as brought by 1978's The BASIC Cookbook.

• TRACTON, Ken. The BASIC Cookbook, 1st edition. Tab Books. USA, 1978.