function acotf( x ) {
	return addon( x );
}
Computes the inverse cotangent of a single-precision floating-point number.

@private
@param {number} x - input value
@returns {number} inverse cotangent (in radians)

@example
var v = acotf( 2.0 );
// returns ~0.4636

@example
var v = acotf( 0.0 );
// returns ~1.5708

@example
var v = acotf( 0.5 );
// returns ~1.1071

@example
var v = acotf( 1.0 );
// returns ~0.7854

@example
var v = acotf( NaN );
// returns NaN

@example
var v = acotf( Infinity );
// returns 0.0