@Isaac The tag (trigonometry) and its content was brought up on meta recently. Since you are the creator of the tag-excerpt, perhaps you could be able to comment on the intended meaning of the tag. Sorry for pinging you here on an unrelated question. After you see this comment, it is no longer needed - feel free to ping me here or in chat to let me know that I can remove it. (Alternatively, you can flag and the mods remove the comment.) — Martin Sleziak 45 secs ago