When the magnitude of the resultant of two vectors of equal magnitude is equal to either of them what is the angle between the two vectors?

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Text Solution

Solution : Let the two vectors be P and Q <br> Given, P=Q <br> and `theta=120^(@)` <br> Magnitude of resultant vector is <br> `R=sqrt(P^(2)+Q^(2)+2pQ cos 120^(@))` <br> `=sqrt(P^(2)+P^(2)+2P^(2)xx(-1)/(2))=sqrt(P^(2))=P`

If the magnitude of the resultant of two vectors of equal magnitudes is equal to the magnitude of either vectors, then the angle between two vectors is

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