code: public static BigDecimal asinh(BigDecimal x, MathContext mathContext) {
  		checkMathContext(mathContext);
  		MathContext mc = new MathContext(mathContext.getPrecision() + 10, mathContext.getRoundingMode());
  		BigDecimal result = log(x.add(sqrt(x.multiply(x, mc).add(ONE, mc), mc), mc), mc);
  		return round(result, mathContext);
  	}
docs: Calculates the arc hyperbolic sine (inverse hyperbolic sine) of {@link BigDecimal} x.
  
  <p>See: <a href="https://en.wikipedia.org/wiki/Hyperbolic_function">Wikipedia: Hyperbolic function</a></p>
  
  @param x the {@link BigDecimal} to calculate the arc hyperbolic sine for
  @param mathContext the {@link MathContext} used for the result
  @return the calculated arc hyperbolic sine {@link BigDecimal} with the precision specified in the <code>mathContext</code>
  @throws UnsupportedOperationException if the {@link MathContext} has unlimited precision