Difference between revisions of "Manuals/calci/PI"

Revision as of 03:02, 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 <math>\frac {22}{7} is approximate to the π 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

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-<div id="16SpaceContent" align="left"><div class="ZEditBox" align="justify">
+<div style="font-size:30px">'''PI()'''</div><br/>
+==Description==
+*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 <math>\Pi</math>.
+*<math>\Pi</math>  is commonly defined as the ratio of a circle's circumference C to its diameter d.
+*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.
+*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.
+==Examples==
+#Pi()=3.141592653589793
+#Pi()/4=0.785398163
+#Pi()/180=0.017453293
+#Pi()/(22/7)=0.999597663
+#Pi()*(5^2)=78.53981634(Area of circle with r=5)
+#2*Pi()*5=31.41592654(Circumference of a cidcle with r=5).
+==See Also==
+*[[Manuals/calci/SIN  | SIN   ]]
+*[[Manuals/calci/COS  | COS ]]
+*[[Manuals/calci/TAN  |TAN   ]]
+==References==
 Syntax
@@ Line 29: / Line 58: @@
 Lets see an example
-<nowiki>=PI () is 3.14</nowiki>
+UNIQ9a8ffac247c60f4e-nowiki-00000002-QINU
 and,  =PI ()/3 is 1.0472