atand

Compute the arctangent in degrees of a double-precision floating-point number.

Installation

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

Usage

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

atand( x )

Computes the arctangent (in degrees) of a double-precision floating-point number.

var sqrt = require( '@stdlib/math-base-special-sqrt' );
var v = atand( 0.0 );
// returns 0.0

v = atand( 0.5 );
// returns ~26.57

v = atand( 1.0 / sqrt( 3.0 ) );
// returns ~30.0

v = atand( 1.0 );
// returns 45.0

v = atand( Infinity );
// returns 90.0

v = atand( NaN );
// returns NaN

Examples

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

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

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

Usage

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

stdlib_base_atand( x )

Computes the arctangent (in degrees) of a double-precision floating-point number.

double out = stdlib_base_atand( 0.0 );
// returns 0.0

out = stdlib_base_atand( 0.5 );
// returns ~26.57

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_atand( const double x );

Examples

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

int main( void ) {
    const double x[] = { 1.0, 1.45, 1.89, 2.33, 2.78, 3.22, 3.66, 4.11, 4.55, 5.0 };
    
    double v;
    int i;
    for ( i = 0; i < 10; i++ ) {
        v = stdlib_base_atand( x[ i ] );
        printf( "atand(%lf) = %lf\n", x[ i ], v );
    }
}

See Also

• @stdlib/math-base/special/atan: compute the arctangent of a double-precision floating-point number.
• @stdlib/math-base/special/atanh: compute the hyperbolic arctangent of a double-precision floating-point number.
• @stdlib/math-base/special/acosd: compute the arccosine (in degrees) of a double-precision floating-point number.

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

License

See LICENSE.

Copyright

Copyright © 2016-2024. The Stdlib Authors.