secd

Compute the secant of an angle measured in degrees.

Installation

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

Usage

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

secd( x )

Computes the secant of x (in degrees).

var v = secd( 30 );
// returns ~1.15

v = secd( 45 );
// returns ~1.41

v = secd( 60 );
// returns ~2.0

v = secd( 90 );
// returns 16331239353195370

v = secd( 0 );
// returns 1.0

v = secd( NaN );
// returns NaN

Examples

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

var x = linspace( 1.1, 5.1, 100 );

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

C APIs

Usage

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

stdlib_base_secd( x )

Computes the secant of x (in degrees).

double out = stdlib_base_secd( 30.0 );
// returns ~1.15

out = stdlib_base_secd( 45.0 );
// returns ~1.41

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_secd( const double x );

Examples

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

int main( void ) {
    const double x[] = { 0.0, 30.0, 45.0, 60.0, 90.0 };

    double y;
    int i;
    for ( i = 0; i < 5; i++ ) {
        y = stdlib_base_secd( x[ i ] );
        printf( "secd(%lf) = %lf\n", x[ i ], y );
    }
}

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.