If O be the origin and the position vector of A be \[4\,\mathbf{i}+5\,\mathbf{j},\] then a unit vector parallel to \[\overrightarrow{OA}\] is

\[\frac{1}{\sqrt{41}}(4\,\mathbf{i}-5\,\mathbf{j})\]

\[\frac{4}{\sqrt{41}}\mathbf{i}\]

\[\frac{5}{\sqrt{41}}\mathbf{i}\]

\[\frac{1}{\sqrt{41}}(4\,\mathbf{i}+5\,\mathbf{j})\]

If O be the origin and the position vector of A be \[4\,\mathbf{i}+5\,

1.	If O be the origin and the position vector of A be \[4\,\mathbf{i}+5\,\mathbf{j},\] then a unit vector parallel to \[\overrightarrow{OA}\] is
A.	\[\frac{4}{\sqrt{41}}\mathbf{i}\]
B.	\[\frac{5}{\sqrt{41}}\mathbf{i}\]
C.	\[\frac{1}{\sqrt{41}}(4\,\mathbf{i}+5\,\mathbf{j})\]
D.	\[\frac{1}{\sqrt{41}}(4\,\mathbf{i}-5\,\mathbf{j})\]
Answer» D. \[\frac{1}{\sqrt{41}}(4\,\mathbf{i}-5\,\mathbf{j})\]

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If O be the origin and the position vector of A be \[4\,\mathbf{i}+5\,\mathbf{j},\] then a unit vector parallel to \[\overrightarrow{OA}\] is

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