Two bar magnets of magnetic moment M and `(3M)/(5) ` are kept in a region of magnetic field B such that both the magnets make an angle of `45^@` with each other. Calculate the angle between the magnet of magnetic moment `(3M)/(5)` and the magnetic meridian.

Explanation

To solve the problem, we need to find the angle between the magnet of magnetic moment \( \frac{3M}{5} \) and the magnetic meridian, given that the two magnets make an angle of \( 45^\circ \) with each other.

### Step-by-Step Solution:

1. **Understanding the Problem**:
- We have two magnets with magnetic moments \( M \) and \( \frac{3M}{5} \).
- The angle between the two magnets is \( 45^\circ \).
- We need to find the angle \( \theta \) that the magnet with magnetic moment \( \frac{3M}{5} \) makes with the magnetic meridian (the direction of the magnetic field \( B \)).
...