xHarbour Reference Documentation > Function Reference

Cos()

Calculates the cosine for an angle.

Syntax

Cos( <nAngle> ) --> nCosine

Arguments

<nAngle>

A numeric value specifies the angle as a fraction (or multiple) of Pi().

Return

The function returns the cosine of an angle in the range between -1 and +1.

Info

See also:	CosH(), Cot(), DtoR(), RtoD(), SetPrec(), Sin(), Tan()
Category:	CT:Math , Mathematical functions , Trigonometric functions
Source:	ct\trig.c
LIB:	xhb.lib
DLL:	xhbdll.dll

Example

// The example displays results of function Cos().

   PROCEDURE Main
      ? Str( Cos( -Pi()*1.0 ), 18, 15)  // result: -1.000000000000000
      ? Str( Cos( -Pi()*0.5 ), 18, 15)  // result:  0.000000000000000
      ? Str( Cos( -Pi()*0.3 ), 18, 15)  // result:  0.587785252292473
      ? Str( Cos(  Pi()*0.0 ), 18, 15)  // result:  1.000000000000000
      ? Str( Cos(  Pi()*0.3 ), 18, 15)  // result:  0.587785252292473
      ? Str( Cos(  Pi()*0.5 ), 18, 15)  // result:  0.000000000000000
      ? Str( Cos(  Pi()*1.0 ), 18, 15)  // result: -1.000000000000000
   RETURN