private void CalculateArcAngularFunction(AngularFunction angularFunction, double boxValue)
 {
     if (unitOfAngle.Text == "Rad")
     {
         operand    = (angularFunction(boxValue));
         ioBox.Text = operand.ToString(outputPrecision.GetPrecision());
     }
     else
     {
         operand    = angularFunction(boxValue) * 180 / Math.PI;
         ioBox.Text = operand.ToString(outputPrecision.GetPrecision());
     }
 }
 private void CalculateAngularFunction(AngularFunction angularFunction, double boxValue)
 {
     if (unitOfAngle.Text == "Rad")
     {
         operand    = (angularFunction(boxValue));
         ioBox.Text = operand.ToString(outputPrecision.GetPrecision());
     }
     else
     {
         double temp = boxValue;
         temp      *= (Math.PI / 180);
         operand    = angularFunction(temp);
         ioBox.Text = operand.ToString(outputPrecision.GetPrecision());
     }
 }