About stdlib...
We believe in a future in which the web is a preferred environment for numerical computation. To help realize this future, we've built stdlib. stdlib is a standard library, with an emphasis on numerical and scientific computation, written in JavaScript (and C) for execution in browsers and in Node.js.
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Evaluate the tangent of a number.
The tangent is defined as
npm install @stdlib/mathbasespecialtan
var tan = require( '@stdlib/mathbasespecialtan' );
Evaluates the tangent of a number
(in radians).
var v = tan( 0.0 );
// returns ~0.0
v = tan( 3.141592653589793/4.0 );
// returns ~1.0
v = tan( 3.141592653589793/4.0 );
// returns ~1.0
v = tan( NaN );
// returns NaN
var linspace = require( '@stdlib/arraybaselinspace' );
var PI = require( '@stdlib/constantsfloat64pi' );
var tan = require( '@stdlib/mathbasespecialtan' );
var x = linspace( PI/2.0, PI/2.0, 100 );
var i;
for ( i = 0; i < x.length; i++ ) {
console.log( tan( x[ i ] ) );
}

@stdlib/mathbase/special/cos
: compute the cosine of a number. 
@stdlib/mathbase/special/sin
: compute the sine of a number.
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.
Copyright © 20162024. The Stdlib Authors.