Let \(z = 1 + \sqrt{7}i\). In the polar form of \(z\), what is the argument rounded to 4 decimal places?
The answer is \(1.2094\).
The argument is given by \(\tan^{-1} \frac{\sqrt{7}}{1} = \tan^{-1} \sqrt{7} = 1.2094292\ldots \approx 1.2094\).