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If hati and hatj are unit vectors along ...

If `hati` and `hatj` are unit vectors along X-and Y-axis respectively, then what is the magnitude and direction of `hati +hatj` and `hati - hatj` ?

Text Solution

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`overset(rarr)i+overset(rarr)j=sqrt(1^(2)+1^(2))=sqrt(2), overset(rarr)i-overset(rarr)j=sqrt(1^(2)+(-1)^(2))=sqrt(2)`
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