<define-tag mytitle> The Pi FAQ - <if <get-var render-body /> "Answers" "Table of Contents" /> </define-tag> <?xml version="1.0" encoding="utf-8"?> <!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US"> <head> <title><mytitle /></title> <meta charset="utf-8" /> <link rel="stylesheet" href="$(ROOT)/style.css" type="text/css" /> </head> <body> <h1><mytitle /></h1> <if "<get-var render-body />" "" "<p>" /> <question anchor="what_is" title="What is Pi?"> <p> Pi is the sum of the infinite series 1 - 1/3 + 1/5 - 1/7 + 1/9 - 1/11... multiplied by 4. </p> </question> <question anchor="how_much" title="How much is Pi, approximately?"> <p> The value of Pi varies according to the radius of the circle, so it's hard to tell. </p> </question> <question anchor="approx" title="Approximating Pi"> </question> <promote /> <question anchor="when_zeroes" title="How many digits will I have to produce to reach a state of all-zeroes?"> <p> It was proven that after a number between 1.345698 and 1.74 times 10 ** 12 digits, Pi is all zeros. </p> </question> <question anchor="complexity" title="What is the fastest algorithm for approximating Pi?"> <p> Approximating Pi was found to be NP-Complete. </p> </question> <demote /> <question anchor="Uses" title="What can I do with Pi?"> <p> The most common use of Pi is to generate random sequences. A far less common use is for geometrical and trigonometrical calculations. </p> </question> <if "<get-var render-body />" "" "</p>" /> </body> </html>