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csc

README.md

Cosecant

Evaluate the cosecant of a number.

Usage

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

csc( x )

Evaluates the cosecant of x (in radians).

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

v = csc( 3.141592653589793/2.0 );
// returns 1.0

v = csc( -3.141592653589793/6.0 );
// returns ~-2.0

v = csc( 3.141592653589793/6.0 );
// returns ~2.0

v = csc( NaN );
// returns NaN

Examples

var uniform = require( '@stdlib/random/array/uniform' );
var logEachMap = require( '@stdlib/console/log-each-map' );
var TWO_PI = require( '@stdlib/constants/float64/two-pi' );
var csc = require( '@stdlib/math/base/special/csc' );

var opts = {
    'dtype': 'float64'
};
var x = uniform( 100, -TWO_PI, TWO_PI, opts );

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

C APIs

Usage

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

stdlib_base_csc( x )

Evaluates the cosecant of x (in radians).

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

out = stdlib_base_csc( 3.141592653589793 / 2.0 );
// returns 1.0

The function accepts the following arguments:

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

Examples

#include "stdlib/math/base/special/csc.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_csc( x[ i ] );
        printf( "csc(%lf) = %lf\n", x[ i ], y );
    }
}

See Also