code: public static BigDecimal cosh(BigDecimal x, MathContext mathContext) {
  		checkMathContext(mathContext);
  		MathContext mc = new MathContext(mathContext.getPrecision() + 4, mathContext.getRoundingMode());
  		BigDecimal result = CoshCalculator.INSTANCE.calculate(x, mc);
  		return round(result, mathContext);
  	}
docs: Calculates the hyperbolic cosine 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 hyperbolic cosine for
  @param mathContext the {@link MathContext} used for the result
  @return the calculated hyperbolic cosine {@link BigDecimal} with the precision specified in the <code>mathContext</code>
  @throws UnsupportedOperationException if the {@link MathContext} has unlimited precision