asec

asec

Compute the inverse (arc) secant of a number.

Usage

var asec = require( '@stdlib/math/base/special/asec' );

asec( x )

Computes the inverse (arc) secant of x.

var v = asec( 1.0 );
// returns 0.0

v = asec( 2.0 );
// returns ~1.0472

v = asec( NaN );
// returns NaN

The domain of x is restricted to the intervals [-inf, -1] and [1, inf]. For x outside of these intervals, the function returns NaN.

var v = asec( -0.5 );
// returns NaN

v = asec( 0.5 );
// returns NaN

Examples

var linspace = require( '@stdlib/array/base/linspace' );
var asec = require( '@stdlib/math/base/special/asec' );

var x = linspace( 1.0, 10.0, 100 );

var i;
for ( i = 0; i < x.length; i++ ) {
    console.log( asec( x[ i ] ) );
}