Kernel Sine
Compute the sine of a number on
[-π/4, π/4]
.
Usage
var kernelSin = require( '@stdlib/math/base/special/kernel-sin' );
kernelSin( x, y )
Computes the sine of a number
on [-π/4, π/4]
. For increased accuracy, the number for which the sine should be evaluated can be supplied as a double-double number (i.e., a non-evaluated sum of two double-precision floating-point numbers x
and y
).
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
Notes
As components of a double-double number, the two double-precision floating-point numbers
x
andy
must satisfywhere
ulp
stands for units in the last place.
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( 'kernelSin(%d) = %d', x[ i ], kernelSin( x[ i ], 0.0 ) );
}