Reedwan said:
Pls could give me a website that explains mathematics. I want to understand and master mathematics at graduate level. I maths, I do maths exercise but I don't understand it very well. Thank you
This questions is very broad.
If you want to master maths through a 'website' the best you can do is get textbooks, work through ALL the problems in the problem sets and post questions you find challenging so people can help you. This is the only way to learn maths, there is no way around it. You have to actively practice and solve problems. However, this alone will not help you master maths, to master maths you need to think, ask questions, prove things rigorously, and above all be intelligent etc. Have a read of the answers to these question, they may help
If by website you mean something like MIT OCW or Khan Academy, then watching the videos is absolutely useless. If you keep watching millions of football games, you will never be good at football, similarly, if you watch someone else do the maths, you will never be good at it. You have to actively practice it. Learning by osmosis does not work, especially for maths.
If your current level is bellow high school, then get some books on trig, calculus, algebra, etc. If you're comfortable with high school level maths, then follow a university program, any university.
Most universities have the following course plan:
- linear algebra
- singe variable calculus
- multivariable calculus
- differential equations
- probability and statistics
- real analysis
- complex analysis
- geometry
- metric spaces
- number theory
- topology
- etc.