# @stdlib/math-base-special-kernel-sin

0.2.2 • Public • Published

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# kernelSin

Compute the sine of a double-precision floating-point number on [-π/4, π/4].

## Installation

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

## Usage

var kernelSin = require( '@stdlib/math-base-special-kernel-sin' );

#### kernelSin( x, y )

Computes the sine of a double-precision floating-point number on [-π/4, π/4].

var v = kernelSin( 0.0, 0.0 );
// returns ~0.0

v = kernelSin( 3.141592653589793/6.0, 0.0 );
// returns ~0.5

v = kernelSin( 0.619, 9.279e-18 );
// returns ~0.58

v = kernelSin( NaN, 0.0 );
// returns NaN

v = kernelSin( 3.0, NaN );
// returns NaN

v = kernelSin( NaN, NaN );
// returns NaN

## Examples

var linspace = require( '@stdlib/array-base-linspace' );
var PI = require( '@stdlib/constants-float64-pi' );
var kernelSin = require( '@stdlib/math-base-special-kernel-sin' );

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

var i;
for ( i = 0; i < x.length; i++ ) {
console.log( 'sine(%d) = %d', x[ i ], kernelSin( x[ i ], 0.0 ) );
}

## C APIs

### Usage

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

#### stdlib_base_kernel_sin( x, y )

Computes the sine of a double-precision floating-point number on [-π/4, π/4].

double out = stdlib_base_kernel_sin( 0.0, 0.0 );
// returns ~0.0

out = stdlib_base_kernel_sin( 0.619, 9.279e-18 );
// returns ~0.58

The function accepts the following arguments:

• x: [in] double input value (in radians, assumed to be bounded by ~pi/4 in magnitude).
• y: [in] double tail of x.
double stdlib_base_kernel_sin( const double x, const double y );

### Examples

#include "stdlib/math/base/special/kernel_sin.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 };

double out;
int i;
for ( i = 0; i < 10; i++ ) {
out = stdlib_base_kernel_sin( x[ i ], 0.0 );
printf ( "x: %lf, y: %lf, out: %lf\n", x[ i ], 0.0, out );
}
}

## 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.

## Package Sidebar

### Install

npm i @stdlib/math-base-special-kernel-sin

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