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If ahati +bhatj is a unit vector and it ...

If `ahati +bhatj` is a unit vector and it is perpendicular to `hati +hatj` , then value of a and b is

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Let `vec(v)=v hat(i)` & `vec(OP)=xhat(i)+yhat(j)=xhat(i)+dhat(j)`

so `vec(OP)xxvec(v)=(xhat(i)+dhat(j))xxvhat(i)=-dvhat(k)`
(d= is constant)
which is independent of position.
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