1.

The magnitude of resultant of two vectors is 12 units if the magnitude of one vector is 20 units and the resultant vector is 90° to the other vector then the magnitude of other vecter will be______please answer i will maek as brainlist​

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ANSWER:

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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