/[emacs]/emacs/lisp/calc/calcalg2.el
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revision 1.9 by jpb, Sun Nov 7 23:33:29 2004 UTC revision 1.10 by jpb, Mon Nov 8 02:21:11 2004 UTC
# Line 981  Line 981 
981    
982      ;; Integration by substitution, for various likely sub-expressions.      ;; Integration by substitution, for various likely sub-expressions.
983      ;; (In first pass, we look only for sub-exprs that are linear in X.)      ;; (In first pass, we look only for sub-exprs that are linear in X.)
984      (or (if math-linear-subst-tried      (or (math-integ-try-linear-substitutions expr)
985              (math-integ-try-substitutions expr)          (math-integ-try-substitutions expr)
           (math-integ-try-linear-substitutions expr))  
986    
987          ;; If function has sines and cosines, try tan(x/2) substitution.          ;; If function has sines and cosines, try tan(x/2) substitution.
988          (and (let ((p (setq rat-in (math-expr-rational-in expr))))          (and (let ((p (setq rat-in (math-expr-rational-in expr))))

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