What is i and j in a vector?

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Solution

The unit vector in the x-axis direction is $\hat{i}$ , the unit vector in the y-axis direction is $\hat{j}$ , and the unit vector in the z-axis direction is $\hat{k}$ .
A unit vector can be defined as a vector with a magnitude of one, it is also known as direction vector.
The mathematical form of unit vector
$unit vector = \frac{vector}{magnitude of the vector} \hat{A} = \frac{\vec{A}}{|A|}$
$\hat{i}$ , $\hat{j}$ ,and $\hat{k}$ are the unit vector along the x , y , z axis.
$\hat{i}$ and $\hat{j}$ are the direction vector as well as unit vector along x-axis and y-axis.

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