kernelSincosf

Simultaneously compute the sine and cosine of an angle measured in radians on [-π/4, π/4] in single-precision floating-point format.

Installation

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

Usage

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

kernelSincosf( x )

Simultaneously computes the sine and cosine of an angle measured in radians on [-π/4, π/4] in single-precision floating-point format.

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 and cosine 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.

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

Examples

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 ] );
}

C APIs

Usage

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

stdlib_base_kernel_sincosf( x, &sine, &cosine )

Simultaneously computes the sine and cosine of an angle measured in radians on [-π/4, π/4] in single-precision floating-point format.

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.

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

Examples

#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 );
    }
}

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.

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Copyright

Copyright © 2016-2026. The Stdlib Authors.