@stdlib/math-base-special-asecf/lib/main.js

Compute the inverse (arc) secant of a single-precision floating-point number.

/**
* @license Apache-2.0
*
* Copyright (c) 2024 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 acosf = require( '@stdlib/math-base-special-acosf' );
var float64ToFloat32 = require( '@stdlib/number-float64-base-to-float32' );


// MAIN //

/**
* Computes the inverse (arc) secant of a single-precision floating-point number.
*
* ## Method
*
* ```text
* \operatorname{asecf}(x) = \operatorname{acosf}(\frac{1}{x})
* ```
*
* @param {number} x - input value
* @returns {number} inverse (arc) secant
*
* @example
* var v = asecf( 1.0 );
* // returns 0.0
*
* @example
* var v = asecf( 2.0 );
* // returns ~1.0472
*
* @example
* var v = asecf( NaN );
* // returns NaN
*/
function asecf( x ) {
	return acosf( float64ToFloat32( 1.0 / float64ToFloat32( x ) ) );
}


// EXPORTS //

module.exports = asecf;