Exactly the same as this question. I have tried the answer there, but I can't seem to get it to work even with various permutations.
I want to have an index entry that says "circular functions, see trigonometric functions". Here are what I've tried:
Each of the above produces the following index on page 3 of the output PDF, with the desired entry missing:
But if I use ERT:
Then I do get the desired output:
Am I doing something wrong or is this a possible LyX bug?