$$\frac { \sin 18 ^ { \circ } } { \cos 72 ^ { \circ } }$$
$\frac{6180339887498948}{6180339887498949}\approx 1$
$$\frac{0.3090169943749474}{0.30901699437494745}$$
$$\frac{30901699437494740}{30901699437494745}$$
$$\frac{6180339887498948}{6180339887498949}$$
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$\frac{4182553 \cdot 369411929 \cdot 2 ^ {2}}{3 \cdot 17 \cdot 19 \cdot 2531 \cdot 5813 \cdot 433507} = 0.9999999999999999$
