How to use

AsinCalculator

in

ch.obermuhlner.math.big.internal

public static BigDecimal asin(BigDecimal x, MathContext mathContext) {
  if (x.compareTo(ONE) > 0) {
    throw new ArithmeticException("Illegal asin(x) for x > 1: x = " + x);
  }
  if (x.compareTo(MINUS_ONE) < 0) {
    throw new ArithmeticException("Illegal asin(x) for x < -1: x = " + x);
  }
  
  if (x.signum() == -1) {
    return asin(x.negate(), mathContext).negate();
  }
  
  MathContext mc = new MathContext(mathContext.getPrecision() + 6, mathContext.getRoundingMode());
  if (x.compareTo(BigDecimal.valueOf(0.707107)) >= 0) {
    BigDecimal xTransformed = BigDecimalMath.sqrt(ONE.subtract(x.multiply(x, mc), mc), mc);
    return acos(xTransformed, mathContext);
  }
  BigDecimal result = AsinCalculator.INSTANCE.calculate(x, mc);
  return result.round(mathContext);
}

BigDecimal result = AsinCalculator.INSTANCE.calculate(x, mc);
return result.round(mathContext);