duminică, 2 noiembrie 2014

Trigonometrie:

Intr-un triunghi dreptunghic, considerand masura unui unghi ascutit numim:  
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.



Relatii uzuale:
                                 
                                                                     
                                                                                                          

                                                                          
                                                                                   
                                                                                
                                                                                
                                                                                  
                                                                            
                                                                                      
           
                                                                 
                                                        
                                                      
                                                                
                                               
                                                       
                                       
                                                          
                                                                      
                                                                      

         Valori uzuale:





00

300

450

600

900



sinx


0






1


cosx


1






0


tgx


0



1





-


ctgx


-


1



0

Niciun comentariu:

Trimiteți un comentariu