If `a rg(z_1)=170^0a n d arg(z_2)70^0` , then find the principal argument of `z_1z_2dot`

Explanation

To find the principal argument of the product of two complex numbers \( z_1 \) and \( z_2 \), given their arguments, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Arguments**:
- We are given that \( \text{arg}(z_1) = 170^\circ \) and \( \text{arg}(z_2) = 70^\circ \).

2. **Use the Property of Arguments**:
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