Determine the amplitude of the complex numbers
`-1+sqrt3i`

Explanation

To determine the amplitude (or argument) of the complex number \( z = -1 + \sqrt{3}i \), we can follow these steps:

### Step 1: Identify the real and imaginary parts
The complex number can be expressed in the form \( z = x + yi \), where:
- \( x = -1 \) (the real part)
- \( y = \sqrt{3} \) (the imaginary part)

### Step 2: Calculate the argument using the formula
...