Is is possible to create 3d games in JS without using any library ? And what kind of maths do i need to learn for making games?

Answer 1

Libraries are code. You could write your own code to do the same thing. However, it will take you months to do so is it worth that time.

Answer 2

Yes, using WebGL (a simpler interface similar but simple to OpenGL thats builtin in all modern browsers). If you dont want use external libraries, you have to know that games ARE very math dependents