Todd Southworth, after bringing the first series sign to the game, now brings the first constant sign to equal pi, exactly. This sign should satisfy those that have criticized us for allowing loose approximations for pi.
Mr. Southworth takes the tangent of an angle in degrees and then the inverse tangent of the result to convert that value to radians.
{{15}\over{5}}! \times \arctan ( \tan 210^\circ ) = \pi
This sign is eastbound CA-210 about on mile before the transition to I-15 in Rancho Cucamonga, California. See sign on map!
1 response so far ↓
1 michel azoulay // Apr 3, 2008 at 9:59 pm
what is the way to built pai 3.14 using geometry constructions
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