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<div style="font-size:30px">'''PI()'''</div><br/>
<div style="font-size:30px">'''PI()'''</div><br/>
==Description==
==Description==
*This function gives the value of <math>pi</math>.
*This function gives the value of <math>pi</math>.
*The <math>pi</math> is a mathematical constant with a value approximate to 3.14159.
*The <math>pi</math> is a mathematical constant with a value approximate to 3.14159.
*It is denoted by the Greek letter <math>\Pi</math>.
*It is denoted by the Greek letter <math>\Pi</math>.
*<math>\Pi</math> is commonly defined as the ratio of a circle's circumference <math>C</math> to its diameter <math>d</math>.
*<math>\Pi</math> is commonly defined as the ratio of a circle's circumference <math>C</math> to its diameter <math>d</math>.
*So <math>\Pi =\frac {C}{d}</math>, the ratio <math> \frac {C}{d}</math> is constant, and it is not considering the circle's size.
*So <math>\Pi =\frac {C}{d}</math>, the ratio <math> \frac {C}{d}</math> is constant, and it is not considering the circle's size.
*<math>\Pi</math> is a transcendental number and irrational number.
*<math>\Pi</math> is a transcendental number and irrational number.
*Being an irrational number,<math>\Pi</math> cannot be expressed exactly as a ratio of any two integers .
*Being an irrational number, <math>\Pi</math> cannot be expressed exactly as a ratio of any two integers .
*But we can express as the fraction <math>\frac {22}{7}</math> is approximate to the <math>\Pi</math> value , also no fraction can be its exact value.
*But we can express as the fraction <math>\frac {22}{7}</math> is approximate to the <math>\Pi</math> value , also no fraction can be its exact value.
==See Also==
==See Also==
*[[Manuals/calci/SIN | SIN ]]
*[[Manuals/calci/SIN | SIN ]]
*[[Manuals/calci/COS | COS ]]
*[[Manuals/calci/COS | COS ]]
*[[Manuals/calci/TAN |TAN ]]
*[[Manuals/calci/TAN | TAN ]]
==References==
==References==
[http://en.wikipedia.org/wiki/Pi Pi]
[http://en.wikipedia.org/wiki/Pi Pi]