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README.md

Outline

acsch

Compute the hyperbolic arccosecant of a number.

Usage

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

acsch( x )

Computes the hyperbolic arccosecant of x.

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

v = acsch( -0.0 );
// returns -Infinity

v = acsch( 1.0 );
// returns ~0.881

v = acsch( -1.0 );
// returns ~-0.881

v = acsch( NaN );
// returns NaN

v = acsch( -Infinity );
// returns -0.0

v = acsch( Infinity );
// returns 0.0

Examples

var uniform = require( '@stdlib/random/array/uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var acsch = require( '@stdlib/math/base/special/acsch' );

var x = uniform( 100, 1.0, 5.0, {
    'dtype': 'float64'
});

logEachMap( 'acsch(%0.4f) = %0.4f', x, acsch );

C APIs

Usage

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

stdlib_base_acsch( x )

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

double out = stdlib_base_acsch( 1.0 );
// returns ~0.881

The function accepts the following arguments:

  • x: [in] double input value.
double stdlib_base_acsch( const double x );

Examples

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

int main( void ) {
    const double x[] = { -5.0, -3.89, -2.78, -1.67, -0.55, 0.55, 1.67, 2.78, 3.89, 5.0 };

    double v;
    int i;
    for ( i = 0; i < 10; i++ ) {
        v = stdlib_base_acsch( x[ i ] );
        printf( "acsch(%lf) = %lf\n", x[ i ], v );
    }
}

See Also

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