public static float atan(float fValue) {
        return (float) Math.atan(fValue);
    }
Returns the arc tangent of an angle given in radians.<br>

@param fValue The angle, in radians.
@return fValue's atan
@see java.lang.Math#atan(double)
jme3-core/src/main/java/com/jme3/math/FastMath.java