Question

from what angle between two equal vectors a and b will the magnitude of the resultant a two vector to be equal to the magnitude of ethier vector
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Answer 1

Answer:

120°

Explanation:

R=2Pcos(theta/2) ( since P=Q=P Given above )

at theta = 120°

R= 2Pcos60

R=2P×½

R=P

Therefore theta = 120°

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