35 lines
850 B
Factor
35 lines
850 B
Factor
! Copyright (C) 2004, 2005 Slava Pestov.
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! See http://factor.sf.net/license.txt for BSD license.
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IN: math
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USING: kernel math math-internals ;
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: acosh ( x -- y ) dup sq 1- sqrt + log ; inline
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: asech ( x -- y ) recip acosh ; inline
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: asinh ( x -- y ) dup sq 1+ sqrt + log ; inline
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: acosech ( x -- y ) recip asinh ; inline
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: atanh ( x -- y ) dup 1+ swap 1- neg / log 2 / ; inline
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: acoth ( x -- y ) recip atanh ; inline
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: [-1,1]? ( x -- ? )
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dup complex? [ drop f ] [ abs 1 <= ] if ; inline
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: asin ( x -- y )
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dup [-1,1]? [ fasin ] [ i * asinh -i * ] if ; inline
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: acos ( x -- y )
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dup [-1,1]? [ facos ] [ asin pi 2 / swap - ] if ; inline
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: atan ( x -- y )
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dup [-1,1]? [ fatan ] [ i * atanh i * ] if ; inline
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: asec ( x -- y ) recip acos ; inline
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: acosec ( x -- y ) recip asin ; inline
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: acot ( x -- y ) recip atan ; inline
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