npm package: @stdlib/math-base-special-kernel-sincosf
Description: Simultaneously compute the sine and cosine of an angle measured in radians on [-π/4, π/4] in single-precision floating-point format.
Author: The Stdlib Authors
Latest version: 0.1.1

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# kernelSincosf

[![NPM version][npm-image]][npm-url] [![Build Status][test-image]][test-url] [![Coverage Status][coverage-image]][coverage-url] <!-- [![dependencies][dependencies-image]][dependencies-url] -->

> Simultaneously compute the [sine][@stdlib/math/base/special/sinf] and [cosine][@stdlib/math/base/special/cosf] of an angle measured in radians on `[-π/4, π/4]` in single-precision floating-point format.

<section class="installation">

## Installation

```bash
npm install @stdlib/math-base-special-kernel-sincosf
```

</section>

<section class="usage">

## Usage

```javascript
var kernelSincosf = require( '@stdlib/math-base-special-kernel-sincosf' );
```

#### kernelSincosf( x )

Simultaneously computes the [sine][@stdlib/math/base/special/sinf] and [cosine][@stdlib/math/base/special/cosf] of an angle measured in radians on `[-π/4, π/4]` in single-precision floating-point format.

```javascript
var sc = kernelSincosf( 0.0 );
// returns [ ~0.0, ~1.0 ]

sc = kernelSincosf( 3.141592653589793/2.0 );
// returns [ ~1.0, ~0.0 ]

sc = kernelSincosf( -3.141592653589793/6.0 );
// returns [ ~-0.5, ~0.866 ]

sc = kernelSincosf( NaN );
// returns [ NaN, NaN ]
```

#### kernelSincosf.assign( x, out, stride, offset )

Simultaneously computes the [sine][@stdlib/math/base/special/sinf] and [cosine][@stdlib/math/base/special/cosf] of an angle measured in radians on `[-π/4, π/4]` in single-precision floating-point format, and stores the results in a provided output array.

```javascript
var Float32Array = require( '@stdlib/array-float32' );

var out = new Float32Array( 2 );

var sc = kernelSincosf.assign( 0.0, out, 1, 0 );
// returns <Float32Array>[ ~0.0, ~1.0 ]

var bool = ( sc === out );
// returns true
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var linspace = require( '@stdlib/array-base-linspace' );
var PI = require( '@stdlib/constants-float64-pi' );
var kernelSincosf = require( '@stdlib/math-base-special-kernel-sincosf' );

var x = linspace( -PI/4.0, PI/4.0, 100 );

var y;
var i;
for ( i = 0; i < x.length; i++ ) {
    y = kernelSincosf( x[ i ] );
    console.log( 'kernelSincosf(%d) = [ %d, %d ]', x[ i ], y[ 0 ], y[ 1 ] );
}
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

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<section class="intro">

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/math/base/special/kernel_sincosf.h"
```

#### stdlib_base_kernel_sincosf( x, &sine, &cosine )

Simultaneously computes the [sine][@stdlib/math/base/special/sinf] and [cosine][@stdlib/math/base/special/cosf] of an angle measured in radians on `[-π/4, π/4]` in single-precision floating-point format.

```c
float cosine;
float sine;

stdlib_base_kernel_sincosf( 0.0, &sine, &cosine );
```

The function accepts the following arguments:

-   **x**: `[in] double` input value (in radians, assumed to be bounded by `~pi/4` in magnitude).
-   **sine**: `[out] float*` destination for the sine.
-   **cosine**: `[out] float*` destination for the cosine.

```c
void stdlib_base_kernel_sincosf( const double x, float* sine, float* cosine );
```

</section>

<!-- /.usage -->

<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

<!-- /.notes -->

<!-- C API usage examples. -->

<section class="examples">

### Examples

```c
#include "stdlib/math/base/special/kernel_sincosf.h"
#include <stdio.h>

int main( void ) {
    const double x[] = { -0.7853981633974483, -0.6108652381980153, -0.4363323129985824, -0.26179938779914946, -0.08726646259971649, 0.08726646259971649, 0.26179938779914935, 0.43633231299858233, 0.6108652381980153, 0.7853981633974483 };

    float cosine;
    float sine;
    int i;
    for ( i = 0; i < 10; i++ ) {
        stdlib_base_kernel_sincosf( x[ i ], &sine, &cosine );
        printf( "kernelSincosf(%lf) = [ %f, %f ]\n", x[ i ], sine, cosine );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

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<section class="main-repo" >

* * *

## Notice

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].

#### Community

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---

## Copyright

Copyright &copy; 2016-2026. The Stdlib [Authors][stdlib-authors].

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[@stdlib/math/base/special/cosf]: https://www.npmjs.com/package/@stdlib/math-base-special-cosf

[@stdlib/math/base/special/sinf]: https://www.npmjs.com/package/@stdlib/math-base-special-sinf

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