coth

Compute the hyperbolic cotangent of a number.

Usage

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

coth( x )

Computes the hyperbolic cotangent of x.

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

v = coth( 2.0 );
// returns ~1.0373

v = coth( -2.0 );
// returns ~-1.0373

v = coth( NaN );
// returns NaN

Examples

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

var x = linspace( -10.0, 10.0, 100 );

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

C APIs

Usage

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

stdlib_base_coth( x )

Computes the hyperbolic cotangent of double-precision floating-point number x.

double out = stdlib_base_coth( 2.0 );
// returns ~1.0373

out = stdlib_base_coth( -2.0 );
// returns ~-1.0373

The function accepts the following arguments:

x: [in] double input value.

double stdlib_base_coth( const double x );

Examples

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

int main( void ) {
    const double x[] = { -4.0, -3.11, -2.22, -1.33, -0.44, 0.44, 1.33, 2.22, 3.11, 4.0 };
    
    double v;
    int i;
    for ( i = 0; i < 10; i++ ) {
        v = stdlib_base_coth( x[ i ] );
        printf( "coth(%lf) = %lf\n", x[ i ], v );
    }
}