Golden ratio
From specialfunctionswiki
The golden ratio is $\varphi = \dfrac{1+\sqrt{5}}{2}.$
Properties
Theorem: The following formula holds: $$2\sin(i \log(\varphi))=i,$$ where $\sin$ denotes the sine function, $i$ denotes the imaginary number, $\log$ denotes the logarithm, and $\varphi$ denotes the golden ratio.
Proof: █
