The true dip at a place is `30^@` but a dip circle at that place shows an apparent dip of `45^@` . If the dip circle is now rotated through `90^@` , what will be the new apparent dip?

Explanation

To solve the problem, we need to find the new apparent dip after rotating the dip circle through 90 degrees. We will use the relationship between true dip, apparent dip, and the angle of rotation.

### Step-by-Step Solution:

1. **Identify the Given Values:**
- True dip (δ) = 30 degrees
- Apparent dip before rotation (δ₁) = 45 degrees

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