The best method to study the behavior of a mathematical function is to see its corresponding graphic representation, and for this you only need a program like Graph Expression.
Graph Expression is a utility, totally free and in English, that allows you to graphically represent any mathematical function in 2D; You can even superimpose the different graphs to make comparisons of the same function, but with different values.
The program also comes with some pre-designed functions (find the sine, cosine, tangent, etc.), but the Graph Expression user can add his own functions, as well as copy the graphics obtained to the clipboard.
You can free download Graph Expression and safe install the latest trial or new full version for Windows 10 (x32, 64 bit, 86) from the official site.
Devices: Desktop PC, Laptop (ASUS, HP, DELL, Acer, Lenovo, MSI), Ultrabook
OS: Professional, Enterprise, Education, Home Edition, versions: 1507, 1511, 1607, 1703, 1709, 1803, 1809