cosh

Compute the hyperbolic cosine of a double-precision floating-point number.

Installation

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

Usage

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

cosh( x )

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

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

v = cosh( 2.0 );
// returns ~3.762

v = cosh( -2.0 );
// returns ~3.762

v = cosh( 710.0 );
// returns Infinity

v = cosh( NaN );
// returns NaN

Examples

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

var x = linspace( -5.0, 5.0, 100 );

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

C APIs

Usage

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

stdlib_base_cosh( x )

Computes the hyperbolic cosine of a double-precision floating-point number.

double out = stdlib_base_cosh( 2.0 );
// returns ~3.762

out = stdlib_base_cosh( -2.0 );
// returns ~3.762

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_cosh( const double x );

Examples

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

int main( void ) {
    const double x[] = { -5.0, -3.89, -2.78, -1.67, -0.56, 0.56, 1.67, 2.78, 3.89, 5.0 };
    
    double v;
    int i;
    for ( i = 0; i < 10; i++ ) {
        v = stdlib_base_cosh( x[ i ] );
        printf( "cosh(%lf) = %lf\n", x[ i ], v );
    }
}

See Also

• @stdlib/math-base/special/cos: compute the cosine of a number.
• @stdlib/math-base/special/sinh: compute the hyperbolic sine of a double-precision floating-point number.
• @stdlib/math-base/special/tanh: compute the hyperbolic tangent 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

Copyright

Copyright © 2016-2024. The Stdlib Authors.