i know this sounds crazy, but my professor is gonna test us over using Wxmaxima to find derivatives of vector value functions..i have no idea how to use the program, so im asking if anyone knows how to use this math program please let me know..here is the problem..

r(t) = 2cost ti+ 3sin tjfind r(3pi/4) and r(pi/6) and r'(t) and r'(3pi/4) and r"(t) and r"(3pi/4).

this problem is very easy to do by hand, but i have no idea how to enter this into Wxmaxima and get it to solve. any thoughts...would be appreciated.