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If the angle between unit vectors veca a...

If the angle between unit vectors `veca and vecb is 60^(@)` . Then find the value of `|veca -vecb|`.

Text Solution

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`|veca-vecb|^(2)=(veca-vecb).(veca-vecb)`
`=a^(2)+b^(2)-2(veca.vecb)`
`1+1-2(1.1.costheta)`
`2(1-1/2)=1`
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