Find angle between ` vecA = 3 hati + 4 hatj and vecB = 12 hati + 5 hatj?`

Explanation

To find the angle between the vectors \( \vec{A} = 3 \hat{i} + 4 \hat{j} \) and \( \vec{B} = 12 \hat{i} + 5 \hat{j} \), we will follow these steps:

### Step 1: Calculate the Magnitude of \( \vec{A} \)
The magnitude of a vector \( \vec{A} = a \hat{i} + b \hat{j} \) is given by:
\[ |\vec{A}| = \sqrt{a^2 + b^2} \]
For \( \vec{A} = 3 \hat{i} + 4 \hat{j} \):
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