Files that have the TEX extension is mostly related to the LaTeX typesetting application. These files are used by this program that may comprise of text and symbols that are needed to come up with mathematical expressions.
The LaTeX program makes use of the TEX files that are generally used for the typesetting of various different science and math applications, like engineering books and physics textbooks. The TEX extension can be used instead of the .LATEX extension, however, the TEX extension is more common to use than the .LATEX file extension.
In addition to the problem described above, i.e. the lack of the appropriate application to support the .TEX file, there may be several reasons that cause problems with opening and operation of the data format:
A quite common problem is the lack of application in the appropriate version. Even if you have an application, with the help of which you should open the .TEX file, you may have a problem with it because of its version. Perhaps in previous versions the application has not yet supported the .TEX file, so download the update and check again.
If you have already installed the appropriate application, and it is the correct version, the file may not open correctly, because the operating system does not have information that this program supports the file. So you need to "show" which program the computer should use. To do this:
It also happens that the file you want to open is corrupt and therefore there is no such possibility. In this situation, you should find its different version, or ask a person from whom you got, to send it again.
There may be several reasons why you cannot open the file with .TEX extension. Directly on this website you can find a solution of the most common problem with the .TEX file – that you do not have on your computer the appropriate program to open the file.