If two vectors `vecA`and `vecB`make angle `30^@ and 45^@` with their resultant and `vecB` has magnitude equal to 10, then find magnitude of `vecA`.

Explanation

To solve the problem, we will use the information given about the angles made by the vectors with their resultant and the magnitude of vector B.

### Step-by-Step Solution:

1. **Understanding the Angles**:
- Let vector A make an angle of \(30^\circ\) with the resultant vector R.
- Let vector B make an angle of \(45^\circ\) with the resultant vector R.
- The magnitude of vector B is given as \(B = 10\).
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