Function: calcFunc-cosh

calcFunc-cosh is an autoloaded and byte-compiled function defined in calc-math.el.gz.

Signature

(calcFunc-cosh X)

Source Code

;; Defined in /usr/src/emacs/lisp/calc/calc-math.el.gz
(defun calcFunc-cosh (x)   ; [N N] [Public]
  (cond ((eq x 0) 1)
	(math-expand-formulas
	 (math-normalize
	  (list '/ (list '+ (list 'calcFunc-exp x)
			 (list 'calcFunc-exp (list 'neg x))) 2)))
	((Math-numberp x)
	 (if calc-symbolic-mode (signal 'inexact-result nil))
	 (math-with-extra-prec 2
	   (let ((expx (math-exp-raw (math-float x))))
	     (math-mul (math-add expx (math-div 1 expx)) '(float 5 -1)))))
	((eq (car-safe x) 'sdev)
	 (math-make-sdev (calcFunc-cosh (nth 1 x))
			 (math-mul (nth 2 x)
				   (calcFunc-sinh (nth 1 x)))))
	((and (eq (car x) 'intv) (math-intv-constp x))
	 (setq x (math-abs x))
	 (math-sort-intv (nth 1 x)
			 (calcFunc-cosh (nth 2 x))
			 (calcFunc-cosh (nth 3 x))))
	((or (equal x '(var inf var-inf))
	     (equal x '(neg (var inf var-inf)))
	     (equal x '(var nan var-nan)))
	 (math-abs x))
	(t (calc-record-why 'numberp x)
	   (list 'calcFunc-cosh x))))