Find a unit vector in the direction of vector `vec(A)=(hat(i)-2hat(j)+hat(k))`.

Explanation

To find a unit vector in the direction of the vector \(\vec{A} = \hat{i} - 2\hat{j} + \hat{k}\), we can follow these steps:

### Step 1: Write down the vector
We start with the vector \(\vec{A}\):
\[ \vec{A} = \hat{i} - 2\hat{j} + \hat{k} \]

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