Hi all,
This works fine:
(%i10) exponentialize(cos(x));
(%o10) (%e^(%i*x)+%e^-(%i*x))/2
(%i11) demoivre(%);
(%o11) cos(x)
but this does not:
(%i12) exponentialize(cosh(x));
(%o12) (%e^x+%e^-x)/2
(%i13) demoivre(%);
(%o13) (%e^x+%e^-x)/2
Is there a function that can do what demoivre does
for trigonometric function?
-- Raoul