public static BigDecimal atan2(BigDecimal y, BigDecimal x) {
        return BigDecimalMath.atan2(y, x, defaultMathContext);
    }
public static BigDecimal atan2 ( BigDecimal y , BigDecimal x ) { return BigDecimalMath . atan2 ( y , x , defaultMathContext ) ; }
Calculates the arc tangens (inverted tangens) of {@link BigDecimal} y / x in the range -<i>pi</i> to <i>pi</i> using the default {@link MathContext}.

@param y the {@link BigDecimal}
@param x the {@link BigDecimal}
@return the calculated arc tangens {@link BigDecimal} with the precision specified in the default {@link MathContext}
@see #setDefaultMathContext(MathContext)
@see #atan2(BigDecimal, BigDecimal)