turned out to be more open-ended than one might have expected.
Emacs Lisp didn't have built-in floating point math (now it does), so
-this had to be
-simulated in software. In fact, Emacs integers will only comfortably
-fit six decimal digits or so---not enough for a decent calculator. So
-I had to write my own high-precision integer code as well, and once I had
-this I figured that arbitrary-size integers were just as easy as large
-integers. Arbitrary floating-point precision was the logical next step.
-Also, since the large integer arithmetic was there anyway it seemed only
-fair to give the user direct access to it, which in turn made it practical
-to support fractions as well as floats. All these features inspired me
-to look around for other data types that might be worth having.
+this had to be simulated in software. In fact, Emacs integers would
+only comfortably fit six decimal digits or so---not enough for a decent
+calculator. So I had to write my own high-precision integer code as
+well, and once I had this I figured that arbitrary-size integers were
+just as easy as large integers. Arbitrary floating-point precision was
+the logical next step. Also, since the large integer arithmetic was
+there anyway it seemed only fair to give the user direct access to it,
+which in turn made it practical to support fractions as well as floats.
+All these features inspired me to look around for other data types that
+might be worth having.
Around this time, my friend Rick Koshi showed me his nifty new HP-28
calculator. It allowed the user to manipulate formulas as well as
the algorithms described above are used. If @var{zone} is omitted,
the computation is done for the current time zone.
-@xref{Reporting Bugs}, for the address of Calc's author, if you
-should wish to contribute your improved versions of
-@code{math-tzone-names} and @code{math-daylight-savings-hook}
-to the Calc distribution.
-
@node Financial Functions, Binary Functions, Date Arithmetic, Arithmetic
@section Financial Functions
@pindex calc-coth
@tindex coth
The remaining trigonometric functions, @code{calc-sec} [@code{sec}],
-@code{calc-csc} [@code{csc}] and @code{calc-sec} [@code{sec}], are also
+@code{calc-csc} [@code{csc}] and @code{calc-cot} [@code{cot}], are also
available. With the Hyperbolic flag, these compute their hyperbolic
counterparts, which are also available separately as @code{calc-sech}
-[@code{sech}], @code{calc-csch} [@code{csch}] and @code{calc-sech}
-[@code{sech}]. (These commmands do not accept the Inverse flag.)
+[@code{sech}], @code{calc-csch} [@code{csch}] and @code{calc-coth}
+[@code{coth}]. (These commmands do not accept the Inverse flag.)
@node Advanced Math Functions, Branch Cuts, Trigonometric and Hyperbolic Functions, Scientific Functions
@section Advanced Mathematical Functions