Brouillon
(1)
\begin{align} \rho(\theta) = \frac{1}{4}+\frac{1}{2}(1-\cos \theta)e^{i\theta} \end{align}
(2)
\begin{align} \varphi = \frac{\sqrt{5}-1}{2} \simeq 0.6180339887498949 \end{align}
(3)
\begin{align} \cos (2\pi \varphi ) \simeq -0.73736887807831986 \end{align}
(4)
\begin{align} \sin ( 2 \pi \varphi) \simeq -0.67549029426152363 \end{align}
(5)
\begin{align} \rho\left(2 \pi \varphi \right) \simeq -0.3905408702184 + -0.58678790734696873i \end{align}
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