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  Classes of Naveed ur Rehman  >  PHP Equations  >  example.php  >  Download  
File: example.php
Role: Example script
Content type: text/plain
Description: Example how to use
Class: PHP Equations
Solve linear, polynomial, trigonometric equations
Author: By
Last change:
Date: 1 year ago
Size: 1,866 bytes
 

Contents

Class file image Download
<?php
 
include("phpequations.class.php");
 
$equations = new phpequations();
?>
<pre>

<h1>Examples for using phpEquations</h1>


<h2>Roots of a linear equation</h2>

    5 - x + 2*4 = 88

<?
 print_r
($equations->solve("

     5 - x + 2*4 = 88

    "
));
?>

<h2>System of linear equations</h2>

    a+b+2*c=5
    a-b = u
    u-2*a=4
    2*b=a

<?
 print_r
($equations->solve("

    a+b+2*c=5
    a-b = u
    u-2*a=4
    2*b=a

    "
));
?>

<h2>Roots of a polynomial equation</h2>

    3*pow(x,5) + 9*pow(x,3)+ x  = 8

<?
 print_r
($equations->solve("

    3*pow(x,5) + 9*pow(x,3)+ x  = 8

    "
));
?>

<h2>System of polynomial equations</h2>

    pow(x,3)/7 +6*pow(y,2) + 5*pow(u,4) = 70
    pow(x,4)/4 + 3*pow(y,3) + 2*pow(u,3) = 40
    3*pow(x,3) +2*pow(y,2)   = 0

<?
 print_r
($equations->solve("

    pow(x,3)/7 +6*pow(y,2) + 5*pow(u,4) = 70
    pow(x,4)/4 + 3*pow(y,3) + 2*pow(u,3) = 40
    3*pow(x,3) +2*pow(y,2)   = 0

    "
));
?>

<h2>Roots of a trigonometric equation</h2>

    sin(A) + cos(A) = 0.5

<?
 print_r
($equations->solve("

    sin(A) + cos(A) = 0.5

    "
));
?>

<h2>System of trigonometric equations</h2>

    sin(A) + cos(B) = 0.5
    pow(sin(A),2) - pow(cos(B),2) = 0.1

<?
 print_r
($equations->solve("

    sin(A) + cos(B) = 0.5
    pow(sin(A),2) - pow(cos(B),2) = 0.1

    "
));
?>

<h2>Volume of sphere</h2>
What will be the radius of sphere having volume of 10 m^3?

    V = (4/3)*PI#*(pow(R,3))
    V = 10

<?
 print_r
($equations->solve("

    V = (4/3)*PI#*(pow(R,3))
    V = 10

    "
));
?>

<h2>Height of building</h2>
One can see the top of a building at 35 deg from horizontal. Building is 20 m away. What is the height of building?

    ANGLE_DEG = 35
    DISTANCE = 20
    tan(ANGLE_DEG*PI#/180)=HEIGHT/DISTANCE

<?
 print_r
($equations->solve("

    ANGLE_DEG = 35
    DISTANCE = 20
    tan(ANGLE_DEG*PI#/180)=HEIGHT/DISTANCE

    "
));
?>