1.

Angle between two equal vectors is 120. Find the magnitude of their resultant vector.

Answer»

Magnitude of the resultant of two vectors of equal magnitude = 2p cos(x/2)

Where x is the angle b/w them and p= magnitude.

Substituting x= 120,

We get mag. = P.

Therefore, Magnitude of the resultant is equal to the magnitude of the vectors.



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