The 25th ed., CRC Standard Mathematical Tables, page 179, gives 1 radian as 59. 295 779 5131 degrees or 206 264.806 25 arcseconds.
From basic principles, using double precision math (162E3/atan(1)), I get 206 264.806 247 096 arcseconds. The 15th digit may be in question. Similarly in degrees (45/atan(1)), 1 radian is 57.295 779 513 0823 degrees ________________________________ From: Brij Bhushan Vij <[email protected]> To: U.S. Metric Association <[email protected]> Sent: Sun, April 3, 2011 1:32:57 PM Subject: [USMA:50265] Re: Astronomical measurements Pierre, Paul Rittman sirs: >A number you may find useful is 206264.8. Is this value for Pi used anywhere in day-to-day life. Any reference avaialable. Most enineering/standard reference books maintain and use the Radian value of 57* 17' 44".88 (57*.2958), which deviate by 0.08 from this value.
