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VALOAREA NUMERICĂ A DIFERENŢEI DE DOI VECTORI<br />
�<br />
d<br />
�<br />
�<br />
a<br />
�<br />
�<br />
b<br />
b �<br />
�<br />
a �<br />
� �<br />
o 2<br />
d � d � d � d � cos0 � d<br />
�� �<br />
� �� �<br />
� � � � � � � � �<br />
a � b � a � b � a � a � a �b<br />
� b � a � b �b<br />
� � � � � � � �<br />
2<br />
a � a � a �b<br />
� b � a � b �b<br />
� a � 2abcos� � b<br />
2<br />
2<br />
�<br />
d<br />
d � a � 2ab cos�<br />
� b<br />
2<br />
�<br />
�<br />
a<br />
�<br />
�<br />
b<br />
2
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