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* @license Apache-2.0
*
* Copyright (c) 2022 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var addon = require( './../src/addon.node' );
// MAIN //
/**
* Computes the tangent on \\( \approx\[-\pi/4, \pi/4] \\) (except on -0), \\( \pi/4 \approx 0.7854 \\).
*
* @private
* @param {number} x - input value (in radians, assumed to be bounded by ~π/4 in magnitude)
* @param {number} y - tail of `x`
* @param {integer} k - indicates whether tan (if k = 1) or -1/tan (if k = -1) is returned
* @returns {number} tangent
*
* @example
* var out = kernelTan( 3.141592653589793/4.0, 0.0, 1 );
* // returns ~1.0
*
* @example
* var out = kernelTan( 3.141592653589793/4.0, 0.0, -1 );
* // returns ~-1.0
*
* @example
* var out = kernelTan( 3.141592653589793/6.0, 0.0, 1 );
* // returns ~0.577
*
* @example
* var out = kernelTan( 0.664, 5.288e-17, 1 );
* // returns ~0.783
*
* @example
* var out = kernelTan( NaN, 0.0, 1 );
* // returns NaN
*
* @example
* var out = kernelTan( 3.0, NaN, 1 );
* // returns NaN
*
* @example
* var out = kernelTan( NaN, NaN, 1 );
* // returns NaN
*/
function kernelTan( x, y, k ) {
return addon( x, y, k );
}
// EXPORTS //
module.exports = kernelTan;
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