tand

Compute the tangent of an angle measured in degrees.

Installation

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

Usage

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

tand( x )

Evaluates the tangent of x (in degrees).

var v = tand( 0.0 );
// returns 0

v = tand( 60.0 );
// returns ~1.73

v = tand( 90.0 );
// returns Infinity

v = tand( NaN );
// returns NaN

Examples

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

var opts = {
    'dtype': 'float64'
};
var x = uniform( 100, -180.0, 180.0, opts );

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

C APIs

Usage

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

stdlib_base_tand( x )

Evaluates the tangent of x (in degrees).

double out = stdlib_base_tand( 0.0 );
// returns 0.0

out = stdlib_base_tand( 60.0 );
// returns ~1.73

The function accepts the following arguments:

• x: [in] double input value.

double stdlib_base_tand( const double x );

Examples

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

See Also

• @stdlib/math-base/special/tan: evaluate the tangent of a number.
• @stdlib/math-base/special/cosd: compute the cosine of an angle measured in degrees.

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 © 2016-2026. The Stdlib Authors.