If vectors ` vecA and vecB ` are ` 3 hati - 4 hatj + 5 hatk ` and ` 2 hati + 3 hatj - 4hatk` respectively then the unit vector parallel to ` vecA + vecB `

Explanation

To find the unit vector parallel to the sum of vectors \(\vec{A}\) and \(\vec{B}\), we will follow these steps:

### Step 1: Define the vectors
Given:
\[ \vec{A} = 3\hat{i} - 4\hat{j} + 5\hat{k} \]
\[
...