@stdlib/math-base-special-sincospi v0.2.1
sincospi
Simultaneously compute the sine and cosine of a number times π.
Installation
npm install @stdlib/math-base-special-sincospi
Usage
var sincospi = require( '@stdlib/math-base-special-sincospi' );
sincospi( x )
Simultaneously computes the sine and cosine of a number
times π more accurately than sincos(pi*x)
, especially for large x
.
var v = sincospi( 0.0 );
// returns [ 0.0, 1.0 ]
v = sincospi( 0.5 );
// returns [ 1.0, 0.0 ]
v = sincospi( 0.1 );
// returns [ ~0.309, ~0.951 ]
v = sincospi( NaN );
// returns [ NaN, NaN ]
sincospi( x, out, stride, offset )
Simultaneously computes the sine and cosine of a number
times π more accurately than sincos(pi*x)
, especially for large x
, and assigns results to a provided output array.
var Float64Array = require( '@stdlib/array-float64' );
var out = new Float64Array( 2 );
var v = sincospi.assign( 0.0, out, 1, 0 );
// returns <Float64Array>[ 0.0, 1.0 ]
var bool = ( v === out );
// returns true
Examples
var linspace = require( '@stdlib/array-base-linspace' );
var sincospi = require( '@stdlib/math-base-special-sincospi' );
var x = linspace( 0.0, 2.0, 101 );
var i;
for ( i = 0; i < x.length; i++ ) {
console.log( sincospi( x[ i ] ) );
}
See Also
@stdlib/math-base/special/cospi
: compute cos(πx).@stdlib/math-base/special/sincos
: simultaneously compute the sine and cosine of a number.@stdlib/math-base/special/sinpi
: compute sin(πx).
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.