If the magnitude of two vectors are 3 and 4 and their scalar product is 6, find angle between them and also find `|vecA xx vecB|`.

Explanation

To solve the problem, we need to find the angle between two vectors A and B given their magnitudes and scalar product. We also need to find the magnitude of their cross product.

### Step 1: Write down the given information
- Magnitude of vector A, |A| = 3
- Magnitude of vector B, |B| = 4
- Scalar product (dot product) A · B = 6

### Step 2: Use the formula for the scalar product
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