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Compute the cosine of a number.
import cos from 'https://cdn.jsdelivr.net/gh/stdlib-js/math-base-special-cos@esm/index.mjs';Computes the cosine of a number (in radians).
var v = cos( 0.0 );
// returns 1.0
v = cos( 3.141592653589793/4.0 );
// returns ~0.707
v = cos( -3.141592653589793/6.0 );
// returns ~0.866
v = cos( NaN );
// returns NaN<!DOCTYPE html>
<html lang="en">
<body>
<script type="module">
import linspace from 'https://cdn.jsdelivr.net/gh/stdlib-js/array-base-linspace@esm/index.mjs';
import TWO_PI from 'https://cdn.jsdelivr.net/gh/stdlib-js/constants-float64-two-pi@esm/index.mjs';
import cos from 'https://cdn.jsdelivr.net/gh/stdlib-js/math-base-special-cos@esm/index.mjs';
var x = linspace( 0.0, TWO_PI, 100 );
var i;
for ( i = 0; i < x.length; i++ ) {
console.log( cos( x[ i ] ) );
}
</script>
</body>
</html>@stdlib/math-base/special/cospi: compute cos(πx).@stdlib/math-base/special/cosm1: compute the cosine of a number minus one.@stdlib/math-base/special/sin: compute the sine of a number.@stdlib/math-base/special/tan: evaluate the tangent of a number.
This package is part of stdlib, a standard library 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.
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