xHarbour Reference Documentation > Function Reference

Tan()

Calculates the tangent.

Syntax

Tan( <nAngle> ) --> nTangent

Arguments

<nAngle>

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

Return

The function returns the tangent in the range of plus and minus Infinity().

Info

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

Example

// The example display results of Tan(). Note that there is a numeric overflow.

   PROCEDURE Main
      ? Str( Tan( -Pi()*1.0 ), 18, 15)  // result:  0.000000000000000
      ? Str( Tan( -Pi()*0.5 ), 18, 15)  // result: ******************
      ? Str( Tan( -Pi()*0.3 ), 18, 15)  // result: -1.376381920471174
      ? Str( Tan(  Pi()*0.0 ), 18, 15)  // result:  0.000000000000000
      ? Str( Tan(  Pi()*0.3 ), 18, 15)  // result:  1.376381920471174
      ? Str( Tan(  Pi()*0.5 ), 18, 15)  // result: ******************
      ? Str( Tan(  Pi()*1.0 ), 18, 15)  // result:  0.000000000000000
   RETURN