NCERT Maths Textbooks
I've realised that the NCERT Maths textbooks had a sufficiently high standard, that we weren't really aware of back in Class 12.
When you try to download an entire textbook from the NCERT Website, the website gives you a ZIP file containing each chapter.
I've assembled all the chapters of each book in one, easy to use PDF file. Here they are: * Class 11 Maths * Class 12 Maths Part 1 * Class 12 Maths Part 2
The copyrights of these textbooks belong to the NCERT.