- #1
gracy
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Homework Statement
If the angle between two vectors A and B is 120 , it's resultant C will be
a)C = I A - B I
b)C< I A - B I
c)C> I A -B I
d)C= I A + BI
Homework Equations
R= √A ^2 + B^2 + 2AB Cos θ
The Attempt at a Solution
C=√ A^2 +B^2 + 2AB Cos 120
= √A^2 + B^2 -2AB 1/2
= √A ^2 + B^2 - AB
I don't know √A ^2 + B^2 - AB is greater or lesser than I A -B l & I A + B l