

PARALLELOGRAM
LAW OF VECTOR ADDITION


Acccording to the parallelogram law of vector addition:  
"If
two vector quantities are represented by two adjacent sides or a parallelogram
then the diagonal of parallelogram will be equal to the resultant of these two vectors." 


EXPLANATION


Consider two vectors . Let the vectors have the following orientation  


parallelogram of these vectors is :  
According to parallelogram law:  
MAGNITUDE
OF
RESULTANT VECTOR 

Magintude or resultant vector can be determined by using either sine law or cosine law.  
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