TeX:
\varphi = 2 \cos\!\left(\frac{\pi}{5}\right)Definitions:
| Fungrim symbol | Notation | Short description |
|---|---|---|
| GoldenRatio | The golden ratio (1.618...) | |
| Cos | Cosine | |
| Pi | The constant pi (3.14...) |
Source code for this entry:
Entry(ID("98a765"),
Formula(Equal(GoldenRatio, Mul(2, Cos(Div(Pi, 5))))))