Cotangent

Evaluate the cotangent of a number.

Installation

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

Usage

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

cot( x )

Evaluates the cotangent of x (in radians).

var v = cot( 0.0 );
// returns Infinity

v = cot( 3.141592653589793/2.0 );
// returns ~0.0

v = cot( -3.141592653589793/4.0 );
// returns ~-1.0

v = cot( 3.141592653589793/4.0 );
// returns ~1.0

v = cot( NaN );
// returns NaN

Examples

var linspace = require( '@stdlib/array-base-linspace' );
var PI = require( '@stdlib/constants-float64-pi' );
var cot = require( '@stdlib/math-base-special-cot' );

var x = linspace( -PI/2.0, PI/2.0, 100 );

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

C APIs

Usage

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

stdlib_base_cot( x )

Evaluates the cotangent of x (in radians).

double out = stdlib_base_cot( 0.0 );
// returns Infinity

out = stdlib_base_cot( 3.141592653589793 / 2.0 );
// returns ~0.0

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_cot( const double x );

Examples

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

int main( void ) {
    const double x[] = { 0.523, 0.785, 1.047, 3.14 };

    double y;
    int i;
    for ( i = 0; i < 4; i++ ) {
        y = stdlib_base_cot( x[ i ] );
        printf( "cot(%lf) = %lf\n", x[ i ], y );
    }
}

See Also

• @stdlib/math-base/special/csc: compute the cosecant of a number.
• @stdlib/math-base/special/tan: evaluate the tangent of a 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.