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BASIC Source File  |  1993-02-20  |  677 b   |  12 lines
  1. '   +----------------------------------------------------------------------+
  2. '   |                                                                      |
  3. '   |        BASWIZ  Copyright (c) 1990-1993  Thomas G. Hanlin III         |
  4. '   |                                                                      |
  5. '   |                      The BASIC Wizard's Library                      |
  6. '   |                                                                      |
  7. '   +----------------------------------------------------------------------+
  8.  
  9. FUNCTION ArcSecD# (Nr AS DOUBLE)
  10.    ArcSecD# = ATN(Nr / SQR(1# - Nr * Nr)) + (SGN(Nr) - 1#) * 1.570796326794897#
  11. END FUNCTION
  12.