Difference between revisions of "Manuals/calci/PI"

Revision as of 03:05, 6 January 2014

PI()

This function gives the value of $pi$ .
The $pi$ is a mathematical constant with a value approximate to 3.14159.
It is denoted by the Greek letter $\Pi$ .
$\Pi$ is commonly defined as the ratio of a circle's circumference C to its diameter d.
So $\Pi ={\frac {C}{d}}$ , the ratio ${\frac {C}{d}}$ is constant, and it is not considering the circle's size.
$\Pi$ is a transcendental number and irrational number.
Being an irrational number, $\Pi$ cannot be expressed exactly as a ratio of any two integers .
But we can express as the fraction ${\frac {22}{7}}$ is approximate to the $\Pi$ value , also no fraction can be its exact value.

Syntax

Examples

''''''' ''''

Description

PI

PI ( )

It calculates a mathematical constant pi which is equal to 3.14159265358979

Lets see an example

?UNIQ9a8ffac247c60f4e-nowiki-00000002-QINU?

and, =PI ()/3 is 1.0472

@@ Line 3: / Line 3: @@
 ==Description==
-*This function gives the value of pi.
+*This function gives the value of <math>pi</math>.
-*The pi 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>.
 *<math>\Pi</math>  is commonly defined as the ratio of a circle's circumference C to its diameter d.
@@ Line 10: / Line 10: @@
 *<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 .
-* But we can express as the fraction <math>\frac {22}{7} is approximate to the  π 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.