# 2. Two vectors, both equal in magnitude, have their resultant equal in magnitude of the either. Find the angle between the two vectors. ORTwo equal forces have their resultant equal to either, what is the inclination between them?

Let the vectors be x.Thier resultant is also x according to the question.ie it is x.By parallelogram law.

r square = a square+b square+2abcos theta

here,x square = x square + x square +2xxcos theta

ie,x square=2x square+2x squarecos theta

ie,-x square=2x square cos theta

or cos theta= -1/2that is theta =120 degree

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Theta can be 210 also
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here the value of thita would be 120 degree

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Theta could be 240 also
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Can anyone make it understand in a better way??plzz..
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find the angle between two vectors A and B if resultant of the vectors is given by R2=A2+B2

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👍👍👍 • 9
Let the vectors be x.Thier resultant is also x according to the question By parallelogram law. r square = a square+b square+2abcos theta here,x square = x square + x square +2xxcos theta x square= 2x square + 2x square cos (theta) -x square= 2x square cos theta or cos theta= -1/2that is theta =120 degree
• 0
Hello friends,??
IF ANYONE has to take the solutions of Aakash package then contact me....??
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For one chapter set 2 solution @ 18???
For set 1 solution @ 10??
For set 1 &2 solution @25??
SOLUTION IN GIVEN IN THE FORM of PDF...?? 