*||gm law of resultant of two vectors

*||^gm law of resultant of two vectors

Resultant of two vectors inclined at an angle θ is given by the diagonal of the parallelogram formed by them. If 

are along adjacent sides of a parallelogram , then  will be the diagonal of the same parallelogram provided 

all have same order. act at an angle θ have, then

c² = a² +b² + 2 ab cosθ    [Law of cosine