Table of Contents

COS

(Defined in TRIGONO.BAS)

The COS() function returns the cosine of the argument.

Function Header

DECLARE FUNCTION COS AS FLOAT (arg AS FLOAT) SHARED STATIC

Warning

You must include the TRIGONO.BAS library in your program to be able to access this function.

Examples

INCLUDE "trigono.bas"
PRINT COS(0) : REM outputs .999403
PRINT COS(0.785398) : REM outputs .707704

Note

Trigonometric functions in XC=BASIC were designed to be fast rather than accurate. The result is accurate to 3 to 4 decimal digits (the error range is 0 to 0.0006). Please see this article for details.

See also