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      <title><![CDATA[matematica - madutzu.webnode.page]]></title>
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      <pubDate>Mon, 02 May 2011 22:50:00 +0200</pubDate>
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         <title><![CDATA[probabilitati]]></title>
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         <description><![CDATA[Evenimente
1. Proba. Eveniment
Consideram ca aruncam un zar. Este evident o experienta aleatoare* adica o experienta al carei rezultat variaza la întâmplare. 
* Cuvantul aleator provine de la latinescul alea, care inseamna zar. 
Daca notam cu {1} aparitia fetei cu un singur punct, cu {2}  aparitia fetei cu doua puncte etc. in urma unei aruncari cu zarul avem  unul din rezultatele
{1}, {2}, {3}, {4}, {5}, {6}
Acestea sunt singurele rezultate posibile si unul dintre ele se produce neaparat....]]></description>
         <pubDate>Mon, 02 May 2011 22:50:00 +0200</pubDate>
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         <title><![CDATA[formule geometrie]]></title>
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         <description><![CDATA[
Geometrie plană   
 Triunghiul


    
        
            
            Perimetrul= suma tuturor laturilor, adica:
            P=AB+BC+CA 	
             Aria triunghiului=(inaltimea x baza)/2, adica:
            Atriunghi=(b x h)/2.
            In cazul nostru, b=BC, iar h=AD. Deci,
            AABC=(BCxAD)/2
            
        
    

  	 	
&#160;

    
        
              
        
    



Paralelogramul

    
        
            
            Perimetrul= suma tuturor laturilor, adica:
 ...]]></description>
         <pubDate>Mon, 02 May 2011 22:48:00 +0200</pubDate>
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         <title><![CDATA[trigonometrie]]></title>
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         <description><![CDATA[Definitii


    
        
            
            Intr-un triunghi dreptunghic, considerand masura unui       unghi ascutit numim:       &#160;
            sinusul=cateta opusa / ipotenuza
            cosinusul=cateta alaturata / ipotenuza
            tangenta=cateta opusa / cateta alaturata
            cotangenta=cateta alaturata / cateta opusa
            Sinusul, cosinusul, tangenta si cotangenta se numesc functii       trigonometrice si se noteaza cu sin, cos, tg, si ctg.
            
    ...]]></description>
         <pubDate>Mon, 02 May 2011 22:45:00 +0200</pubDate>
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