I have a really important question about maple: while using maple to solve my problem (PDE, a few threads before), I did pay attention to the fact the maple is giving different values for 2 equal expressions! for example: assume we want to express sin(d) as a function (only) of tan(d). It's easy to see that 1/tan^2(d) is equal to [1/sin^2(d)]-1. therefore:
from this we have immediately:
now, when I put sin(d) in my solution, I didn't get the same answer as I got with the expression to sin(d) above!!!
Why is this happenning? and what can I do to get ovet it? (I really need to use the expression above instead of sin(d))