Hi,
The Mathcad document have some calculations from the old article. The article says that all the calculations are done on a computer. However, my results do not coincide with those shown in the article. On the screenshots you can find input information (a, t), the formula for calculating the value (x, y, b_0, b_1). I have tried to carry out calculations with different accuracy, but the result is still different. Maybe I missed something?