Trig graph equation won't submit

I am sure this used to work, but it won’t allow an input. It works if I remove the t variable though.

Thanks for any help.

This started happening to some of my activities too about a month or two ago. No idea why, it’s a breaking change of some sort on Desmos’ end.

But you can fix this by adding errorMessage=""

Great! - thanks for your help.

It was brought to my attention that the number “r” in the graph CL is defined as the numericValue from the input, so that’s the reason for the evaluation error message popping up.

Right - thanks!
Not sure why the r was there now, I think it was copied over from another task.

Thanks for your help.