Stavros Macrakis <macrakis <at> alum.mit.edu> writes:
>
> When you say
>
> ? ? ?ev(diff(sin(x),x),x=1);?
>
> You are asking Maxima to calculate diff(sin(x),x) in a
context where all x's
are replaced by 1.
>
> ? ? ? ? ? ? -s
>
>
>
Thank you very much for your quick reply.
I am still puzzled by the fact that
ev(diff(sin(x),x), x=%pi) returns 0
instead of an error. such as in the case of
ev(diff(sin(x),x), x=%pi/4).