Which book should I prefer for maths class12 preparation ..NCERT or Elements? (with just a month left for boards)?

For Class 12 Maths preparation, especially with just a month left for the boards, NCERT books are highly recommended. Here's why:

1. Official Curriculum Alignment: NCERT books are designed according to the CBSE curriculum, ensuring that you cover all necessary topics and concepts required for the board exams24.

2. Simplified Explanations: NCERT books provide clear and concise explanations of mathematical concepts, making them easier to understand and grasp quickly2.

3. Practice Questions: NCERT books include exercises and examples that help in developing problem-solving skills, which are crucial for both board exams and competitive exams like JEE and NEET2.

4. Exemplar Problems: NCERT Exemplar problems offer additional practice and help in understanding complex concepts, making them ideal for last-minute preparation2.

As for "Elements," it doesn't seem to be a commonly recommended book for Class 12 Maths preparation. If you're referring to a specific book titled "Elements," it might not be widely recognized or recommended for CBSE Class 12 Maths.

Given the time constraint, focusing on NCERT books along with some reference books like RD Sharma or RS Aggarwal for additional practice can be beneficial4. However, NCERT should be your primary resource for understanding the core concepts.