9.36.1 Top new questions this week

9.36.1.1 Height of \sin versus \tan in amsmath
9.36.1.2 What is \DocumentMetadata? What key-value pairs does it take and when should I use it?
9.36.1.3 Complex Gaussian wave packet visualized as a 3D
9.36.1.4 Vertical ellipsis in circuitikz
9.36.1.5 Why would I use \dimexpr .. \relax in \setlength?
9.36.1.6 ConTeXt mailing list subscription
9.36.1.7 Implementing a 3x4 subfigure
9.36.1.1 Height of \sin versus \tan in amsmath

https://tex.stackexchange.com/landing/r/digest?cta=question&id=686824

I'm aware of this question that explains the difference between \sin and \cos because of the letter 'i' in \sin.  However, just out of curiosity, I don't understand why \tan isn't treated like \sin in ... 
[formatting] [amsmath]
 
asked by Frunobulax https://tex.stackexchange.com/landing/r/digest?cta=user&id=52582 Score of 13
answered by egreg https://tex.stackexchange.com/landing/r/digest?cta=user&id=4427 Score of 9
9.36.1.2 What is \DocumentMetadata? What key-value pairs does it take and when should I use it?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=686898

So, I stumbled across a document that began with, 
\DocumentMetadata{pdfversion=1.2} 
\nonstopmode\synctex=1 
\documentclass{article} 
I have seen line 2 and 3 in the wild but I have never seen line 1 ... 
[document-configuration]
 
asked by sigsegv https://tex.stackexchange.com/landing/r/digest?cta=user&id=93994 Score of 11
answered by Ulrike Fischer https://tex.stackexchange.com/landing/r/digest?cta=user&id=2388 Score of 15
9.36.1.3 Complex Gaussian wave packet visualized as a 3D

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687175

I am trying to make a 3D plot with TikZ, as shown in the picture, but I was not able to do it. 
I have an example of my Latex code 
\documentclass{article} 
\usepackage[a4paper,top=2cm,bottom=2cm, 
left=... 
[tikz-pgf] [3d] [pgflots]
 
asked by Zeljko Hrcek https://tex.stackexchange.com/landing/r/digest?cta=user&id=145484 Score of 9
answered by Juan CastaA~+-o https://tex.stackexchange.com/landing/r/digest?cta=user&id=231368 Score of 15
9.36.1.4 Vertical ellipsis in circuitikz

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687017

I'm trying to create a summing amplifier circuit using circuitikz with ellipsis to show that it may have infinitely many branches. Unfortunately, unlike \cdots on a horizontal line, \vdots isn't ... 
[tikz-pgf] [circuitikz]
 
asked by glibg10b https://tex.stackexchange.com/landing/r/digest?cta=user&id=297959 Score of 7
answered by Rmano https://tex.stackexchange.com/landing/r/digest?cta=user&id=38080 Score of 9
9.36.1.5 Why would I use \dimexpr .. \relax in \setlength?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=686796

I read somewhere that you should use \dimexpr ... \relax when defining lengths. 
Is that really the case? There seems to be no difference between using it or not: 
\documentclass{article} 
\newlength{\... 
[lengths] [setlength]
 
asked by mrCarnivore https://tex.stackexchange.com/landing/r/digest?cta=user&id=281557 Score of 7
answered by wipet https://tex.stackexchange.com/landing/r/digest?cta=user&id=51799 Score of 4
9.36.1.6 ConTeXt mailing list subscription

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687020

I have been trying to subscribe to the ConTeXt user mailing list (ntg-context@ntg.nl) for two weeks now. However, there is no response from the list admin. The latest entries in the list archive date ... 
[context]
 
asked by horro https://tex.stackexchange.com/landing/r/digest?cta=user&id=245694 Score of 6
answered by Taco Hoekwater https://tex.stackexchange.com/landing/r/digest?cta=user&id=89 Score of 8
9.36.1.7 Implementing a 3x4 subfigure

https://tex.stackexchange.com/landing/r/digest?cta=question&id=687027

I would like to implement the following figure in LaTeX, including the axis labels. 
(Assume that in this image matrix there are 12 individual square pictures ... can I fix the size of the individual ... 
[subfloats]
 
asked by Philippe Knecht https://tex.stackexchange.com/landing/r/digest?cta=user&id=229360 Score of 6
answered by Zarko https://tex.stackexchange.com/landing/r/digest?cta=user&id=18189 Score of 9