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SINHS.BAS
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BASIC Source File
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1992-08-29
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1KB
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41 lines
' +----------------------------------------------------------------------+
' | |
' | BASWIZ Copyright (c) 1990-1992 Thomas G. Hanlin III |
' | |
' | The BASIC Wizard's Library |
' | |
' +----------------------------------------------------------------------+
DEFSNG A-Z
FUNCTION SinHS! (Nr AS SINGLE)
p0 = -630767.3640497716991184787251!
p1 = -89912.72022039509355398013511!
p2 = -2894.211355989563807284660366!
p3 = -26.30563213397497062819489!
q0 = -630767.3640497716991212077277!
q1 = 15215.17378790019070696485176!
q2 = -173.678953558233699533450911!
IF Nr < 0! THEN
N = -Nr
Negate% = -1
ELSE
N = Nr
END IF
IF N > 21! THEN
tmp = EXP(N) / 2!
ELSEIF N > .5! THEN
tmp = (EXP(N) - EXP(-N)) / 2!
ELSE
tmpsq = N * N
tmp1 = (((tmpsq * p3 + p2) * tmpsq + p1) * tmpsq + p0) * N
tmp2 = ((tmpsq + q2) * tmpsq + q1) * tmpsq + q0
tmp = tmp1 / tmp2
END IF
IF Negate% THEN
SinHS! = -tmp
ELSE
SinHS! = tmp
END IF
END FUNCTION