10:14 AM
IIRC the has been deprecated/removed before. At least that's what I've gathered from this past discussion: Tags that encourage off-topic questions.
I see that Michael Renardy created new tags and to add them to line integral with z=tan(t). The question is clearly going to be closed and eventually deleted. But until that happens tag might be used on other questions - so it is possible that the newly created tags survive.
-3

I have the line integral problem $q(x,y,z)=\frac{yx^5}{81}$ for $x=3\cos(t)$, $y=3\sin(t)$, $z=3\tan(t)$ from $0\le t\le \pi/2$. My working so far is: My sticking point is that no matter how I sub in trig identities for sec^4(t) or u-substitute, I cannot find an integratable function. Am I mis...

I have replaced the newly created tags by (which already exists and more-or-less fits the question). I hope this was a reasonable thing to do.
10:37 AM
11:01 AM
Incidentally, here is something related to tag almost exactly a year ago: chat.stackexchange.com/transcript/10243/2017/5/30. (When this tag was created and again removed.)

7 hours later…
5:48 PM