Simultaneously compute the sine and cosine of an angle measured in radians.
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> Simultaneously compute the [sine][@stdlib/math/base/special/sin] and [cosine][@stdlib/math/base/special/cos] of an angle measured in radians.
``bash`
npm install @stdlib/math-base-special-sincos
`javascript`
var sincos = require( '@stdlib/math-base-special-sincos' );
#### sincos( x )
Simultaneously computes the [sine][@stdlib/math/base/special/sin] and [cosine][@stdlib/math/base/special/cos] of an angle measured in radians.
`javascript
var v = sincos( 0.0 );
// returns [ ~0.0, ~1.0 ]
v = sincos( 3.141592653589793/2.0 );
// returns [ ~1.0, ~0.0 ]
v = sincos( -3.141592653589793/6.0 );
// returns [ ~-0.5, ~0.866 ]
`
#### sincos.assign( x, out, stride, offset )
Simultaneously computes the [sine][@stdlib/math/base/special/sin] and [cosine][@stdlib/math/base/special/cos] of an angle measured in radians and assigns the results to a provided output array.
`javascript
var Float64Array = require( '@stdlib/array-float64' );
var out = new Float64Array( 2 );
var v = sincos.assign( 0.0, out, 1, 0 );
// returns
var bool = ( v === out );
// returns true
`
`javascript
var linspace = require( '@stdlib/array-base-linspace' );
var TWO_PI = require( '@stdlib/constants-float64-two-pi' );
var sincos = require( '@stdlib/math-base-special-sincos' );
var x = linspace( 0.0, TWO_PI, 100 );
var i;
for ( i = 0; i < x.length; i++ ) {
console.log( sincos( x[ i ] ) );
}
`
*
`c`
#include "stdlib/math/base/special/sincos.h"
#### stdlib_base_sincos( x, &sine, &cosine )
Simultaneously computes the [sine][@stdlib/math/base/special/sin] and [cosine][@stdlib/math/base/special/cos] of an angle measured in radians.
`c
double cosine;
double sine;
stdlib_base_sincos( 4.0, &sine, &cosine );
`
The function accepts the following arguments:
- x: [in] double input value.[out] double*
- sine: destination for the sine.[out] double*
- cosine: destination for the cosine.
`c`
void stdlib_base_sincos( const double x, double sine, double cosine );
`c
#include "stdlib/math/base/special/sincos.h"
#include
int main( void ) {
const double x[] = { 0.0, 1.57, 3.14, 6.28 };
double cosine;
double sine;
int i;
for ( i = 0; i < 4; i++ ) {
stdlib_base_sincos( x[ i ], &sine, &cosine );
printf( "x: %lf => sine: %lf, cosine: %lf\n", x[ i ], sine, cosine );
}
}
`
*
- [@stdlib/math-base/special/cos][@stdlib/math/base/special/cos]: compute the cosine of a number.
- [@stdlib/math-base/special/sin][@stdlib/math/base/special/sin]: compute the sine of a number.
- [@stdlib/math-base/special/sincospi][@stdlib/math/base/special/sincospi]: simultaneously compute the sine and cosine of a number times π.
*
This package is part of [stdlib][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][stdlib], see the main project [repository][stdlib].
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---
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[umd]: https://github.com/umdjs/umd
[es-module]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Guide/Modules
[deno-url]: https://github.com/stdlib-js/math-base-special-sincos/tree/deno
[deno-readme]: https://github.com/stdlib-js/math-base-special-sincos/blob/deno/README.md
[umd-url]: https://github.com/stdlib-js/math-base-special-sincos/tree/umd
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[esm-url]: https://github.com/stdlib-js/math-base-special-sincos/tree/esm
[esm-readme]: https://github.com/stdlib-js/math-base-special-sincos/blob/esm/README.md
[branches-url]: https://github.com/stdlib-js/math-base-special-sincos/blob/main/branches.md
[@stdlib/math/base/special/cos]: https://www.npmjs.com/package/@stdlib/math-base-special-cos
[@stdlib/math/base/special/sin]: https://www.npmjs.com/package/@stdlib/math-base-special-sin
[@stdlib/math/base/special/sincospi]: https://www.npmjs.com/package/@stdlib/math-base-special-sincospi