By far the most popular and well-stocked category of used instruments is our selection of guitars, where we've got a huge variety of all the big names. Used Gibson Les Paul, pre-owned Fender Telecaster and secondhand Stratocaster guitars are commonly found within these pages, waiting for their new homes with players and collectors.
22/7 is a pretty decent choice for teaching 11-year-olds about fractions that are close to pi. 355/113 would be better, if you think they can remember numbers that big. And approxRational is fun. Exercise for the interested reader: implement an inverse to approxRational.
Some people use a different value, Ï = 6.283185... = 2 Ï, arguing that Ï, as the number of radians in one turn or as the ratio of a circle's circumference to its radius rather than its diameter, is more natural than Ï and simplifies many formulas.till, fractions such as 22/7 and other rational numbers are commonly used to approximate Ï. The digits appear to be randomly distributed; however, to date, no proof of this has been discovered. Also, Ï is a transcendental number â a number that is not the root of any non-zero polynomial having rational coefficients.