asin (Windows CE 5.0)

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Developing an Application > Microsoft C Run-time Library for Windows CE > Run-time Library Reference

Calculates the arcsine.

double asin(    doublex);

Parameters

• x
  Value whose arcsine is to be calculated.

Return Values

The asin function returns the arcsine of x in the range –π/2 to π/2 radians.

If x is less than –1 or greater than 1, asin returns an indefinite (same as a quiet NaN).

Example

[Online;;>/* ASINCOS.C: This program prompts for a value in the range
 * -1 to 1. Input values outside this range will produce
 * _DOMAIN error messages.If a valid value is entered, the
 * program prints the arcsine and the arccosine of that value.
 */

#include <stdlib.h>

void main( void )
{
   double x, y;

   printf( "Enter a real number between -1 and 1: " );
   scanf( "%lf", &x );
   y = asin( x );
   printf( "Arcsine of %f = %f\n", x, y );
   y = acos( x );
   printf( "Arccosine of %f = %f\n", x, y );
}

Output

Enter a real number between -1 and 1: .32696
Arcsine of 0.326960 = 0.333085
Arccosine of 0.326960 = 1.237711

Requirements

OS Versions: Windows CE 2.0 and later.
Header: stdlib.h.
Link Library: coredll.dll.

See Also

acos | atan | cos | sin | tan

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