Greek letter used in math to represent 2 pi

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Possible Answers:

TAU.

Last seen on: Vulture Monday, 24 July 2023 Crossword Answers

Random information on the term “TAU”:

One turn (symbol tr or pla) is a unit of plane angle measurement equal to 2π radians, 360 degrees or 400 gradians.Thus it is the angular measure subtended by a complete circle at its center.

Subdivisions of a turn include half-turns and quarter-turns, spanning a semicircle and a right angle, respectively; metric prefixes can also be used as in, e.g., centiturns (ctr), milliturns (mtr), etc.

As an angular unit, one turn also corresponds to one cycle (symbol cyc or c) or to one revolution (symbol rev or r).

In the ISQ, an arbitrary “number of turns” (also known as “number of revolutions” or “number of cycles”) is formalized as a dimensionless quantity called rotation, defined as the ratio of a given angle and the full turn. .mw-parser-output div.crossreference{padding-left:0}.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}(See below for the formula.)

TAU on Wikipedia