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The resultant of two vector A and B is a...

The resultant of two vector A and B is at right angles to A and its magnitude is half of B. Find the angle between A and B.

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Verified by Experts

The correct Answer is:
A


`R =x cos theta`
or ` (x)/(2) = x cos theta`
`:. cos theta = (1)/(2)`
or `theta = 60^@`
`:. Alpha =150^@`
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