Question 929585
Just divide by the magnitude of the given vector.
{{{abs(W)=4}}}
{{{u[W]=j}}}
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{{{abs(W)=sqrt(1^2+4^2)=sqrt(17)}}}
{{{u[W]=(1/sqrt(17))i-(2/sqrt(17))j}}}
{{{u[W]=(sqrt(17)/17)i-(2/17)sqrt(17)j}}}