acosf

Compute the arccosine of a single-precision floating-point number.

Installation

npm install @stdlib/math-base-special-acosf

Usage

var acosf = require( '@stdlib/math-base-special-acosf' );

acosf( x )

Computes the arccosine of a single-precision floating-point number (in radians).

var v = acosf( 1.0 );
// returns 0.0

v = acosf( 0.707 ); // ~pi/4
// returns ~0.7855

v = acosf( 0.866 ); // ~pi/6
// returns ~0.5236

v = acosf( NaN );
// returns NaN

The domain of x is restricted to [-1,1]. If |x| > 1, the function returns NaN.

var v = acosf( -3.14 );
// returns NaN

Examples

var linspace = require( '@stdlib/array-base-linspace' );
var acosf = require( '@stdlib/math-base-special-acosf' );

var x = linspace( -1.0, 1.0, 100 );

var i;
for ( i = 0; i < x.length; i++ ) {
    console.log( acosf( x[ i ] ) );
}

C APIs

Usage

#include "stdlib/math/base/special/acosf.h"

stdlib_base_acosf( x )

Computes the arccosine of a single-precision floating-point number (in radians).

float out = stdlib_base_acosf( 1.0f );
// returns 0.0f

out = stdlib_base_acosf( 0.707f ); // ~pi/4
// returns ~0.7855f

The function accepts the following arguments:

• x: [in] float input value (in radians).

float stdlib_base_acosf( const float x );

Examples

#include "stdlib/math/base/special/acosf.h"
#include <stdio.h>

int main( void ) {
    const float x[] = { -1.0f, -0.78f, -0.56f, -0.33f, -0.11f, 0.11f, 0.33f, 0.56f, 0.78f, 1.0f };
    
    float v;
    int i;
    for ( i = 0; i < 10; i++ ) {
        v = stdlib_base_acosf( x[ i ] );
        printf( "acos(%f) = %f\n", x[ i ], v );
    }
}

Notice

This package is part of stdlib, a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

Copyright

Copyright © 2016-2024. The Stdlib Authors.