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ARCSINS.BAS
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BASIC Source File
|
1993-01-29
|
1KB
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37 lines
' +----------------------------------------------------------------------+
' | |
' | BASWIZ Copyright (c) 1990-1993 Thomas G. Hanlin III |
' | |
' | The BASIC Wizard's Library |
' | |
' +----------------------------------------------------------------------+
DECLARE FUNCTION PiS! ()
DEFSNG A-Z
FUNCTION ArcSinS! (Nr AS SINGLE)
IF Nr < 0! THEN
N = -Nr
Negate% = -1
ELSE
N = Nr
END IF
IF N > 1 THEN
tmp = 99999!
Negate% = 0
ELSE
tmp = SQR(1 - N * N)
IF N > 0.7 THEN
tmp = PiS! / 2! - ATN(CSNG(tmp / N))
ELSE
tmp = ATN(CSNG(N / tmp))
END IF
END IF
IF Negate% THEN
ArcSinS! = -tmp
ELSE
ArcSinS! = tmp
END IF
END FUNCTION