BARS::Three Way in Arizona Evaluates to a Truncated Pi

These road signs are in Three Way, Arizona. They cannot be submitted to RoadSignMath.com (RSM) because they are not attached to a single pole. In addition, during April 2006, RSM (RoadSignMath.com) discontinued the use of trigonomic functions.

The signs say...

    +-----+ +-------+ +-------+ +-------+
    | End | | South | | South | | North |
    | AZ  | |  AZ   | |  US   | |  US   |
    | 78  | |  75   | |  191  | |  191  |
    +-----+ +-------+ +-------+ +-------+
   the numbers are:  78  75  191  191

   sin(191) = 0.594909
   tan(191) = -0.740126

   78 - 75 - tan(191) - sin(191) = 3.1451

   3.1451 truncated to the hundredths is 3.14

   note:  pi = 3.14159265

   If 3.1451 is rounded to the nearest hundredth, 
   then we are off by 0.01.
Update::2008.03.17

MathBabbler passed through Three Way, Arizona, on his Pi Day 2008 roadtrip.

During late-2007, the spf(n) function was created to turn non-prime numbers into different numbers, but it can't be used on prime numbers. Upon revisiting this BARS, MathBabbler defined three new functions that morph prime numbers into different numbers. One of those functions is multdigits(n) which outputs the product of the digits of 'n'.

   the numbers are:  75  78  191  191

   the math is:  sqrt(multdigits(191) * multdigits(191)) + 75 = 78

   observe...
      multdigits(191) = 1 * 9 * 1 = 9
      3 * 3 = 9
      sqrt(9) = 3
      3 + 75 = 78

Creator: Gerald Thurman [gthurman@gmail.com]
Created: 19 December 2005

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