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a x<br />

-<br />

�<br />

a x -<br />

a<br />

x<br />

M<br />

B<br />

a �<br />

ax �<br />

�<br />

�<br />

A<br />

O<br />

�l � � � AM cos�<br />

� � lAM<br />

� �lAB<br />

� acos�<br />

�<br />

cos�<br />

� � �<br />

a �a � ��<br />

l �<br />

x<br />

x<br />

� � i<br />

i AB<br />

reprezintă proiecţia vectorului a � pe axa Ox<br />

şi este un număr real<br />

reprezintă componenta vectorului a �<br />

pe axa Ox şi este un vector<br />

x

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