- #1

NODARman

- 57

- 13

- TL;DR Summary
- .

Hi, is it possible, is there any formula that can help me to take root from (for example) 1,2 without a calculator (by hand)?

For example, there is a cos(x) formula that can be calculated on the paper:

$$\cos x=\sum_{n=0}^{\infty}(-1)^{n} \frac{x^{2 n}}{(2 n) !}$$

There is the Babylonian method for roots, but it's not as accurate as the cos(x) formula.

$$

x^{\prime}=\frac{1}{2}\left(x+\frac{n}{x}\right)

$$

For example, there is a cos(x) formula that can be calculated on the paper:

$$\cos x=\sum_{n=0}^{\infty}(-1)^{n} \frac{x^{2 n}}{(2 n) !}$$

There is the Babylonian method for roots, but it's not as accurate as the cos(x) formula.

$$

x^{\prime}=\frac{1}{2}\left(x+\frac{n}{x}\right)

$$