Question

vactor of same length how they must be having angle so we get resultant twice of either
a_30 dgree
b_0 dgree
c_ 60 dgree
d_ 45 dgree
​

Answer 1

Answer:

This is an important result to remember. Two vectors at 120 degree produce a vector equal to their magnitude. Let their magnitude be a,

Resultant = a =

(a

2

+a

2

+2×a×a×cosθ)

= a

(2+2cosθ)

=> cosθ =−

2

1

=>θ = 120

0

Explanation:

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