Parkinson's disease is a progressive nervous system disorder that can cause tremors in the hands and arms, rigid muscles and speech changes such as slurring, according to the Mayo Clinic. â
Electric power law: P = V x I   P = power in watts   Einstein's law: E â¦ = m x cÂ²   E = energy in joules, m = mass in kilograms, and c is the speed of light.
As metioned in Wikipedia's biography, Shanks used Machin's formula $$ \pi = 16\arctan(\frac15) - 4\arctan(\frac1{239}) $$. The standard way to use that (and the various Machin-like formulas found later) is to compute the arctangents using the power series. $$ \arctan x = x - \frac{x^3}3 + \frac{x^5}5 - \frac{x^7}7 + \frac{x^9}9 - \cdots $$. Getting $\arctan(\frac15)$ to 707 digits requires about 500 terms calculated to that precision.