How do you find a unit vector of i-3j?

1 Answer
Ratnaker Mehta
Jul 10, 2016

=1/sqrt10i-3/sqrt10j.

Explanation:

For a given non-null vctr. vecv, unit vctr. in its direction is given by, vecv/||vecv||.

For our vecv=i-3j!=vec0, we have ||vecv||=sqrt{1^2+(-3)^2}=sqrt10

Hence, the reqd. unit vector=1/sqrt10i-3/sqrt10j.

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