Henrietta

Henrietta
Found by	Brian
City	Henrietta
State	New York
Country	United States
Continent	North America
Posted on	Apr 7, 2006
Map Location	43° 5' 14" N, 77° 36' 33" W
Numbers	390, 15, 15
Type	Advanced
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Brian Alliet found this sign combination in Henrietta, New York.

Mr. Alliet showed quick-whits and a good trigonetry background here. Realizing the special relationship in the numbers he concludes.

$\sin(390-15)^\circ = \sin 15^\circ$

This sign is on NY 252 eastbound at the junction with NY 15A.