Hello everyone,
When I try to calculate the derivative of (cx)/(1+x) in Maple, I get -cx/(1 + x)^2 as the result:

diff(cx/(1 + x), x)
When I do the calculation manually (see attached image), I get c/(1+x)^2 as the result.

Did I use the wrong command in Maple, or how can I explain the different result?

Thanks for your support,
Jan

Hello,
can anyone tell me why the following expression evaluates to false in Maple?

restart;
evalb(sin(x + y) = sin(x)*cos(y) + cos(x)*sin(y));                 
false

The underlying term "sin(x+y) = sin(x) cos(y) + cos(x) sin(y)" is one of the addition theorems that have been proven to be valid.

Thank you in advance for your answer.

Best regards
Jan