Yes, you can use additional reference books alongside the Hindi textbooks for CBSE Class 9.

Reasons to use additional reference books:

- Enhanced understanding: Using additional reference books can help you gain a deeper understanding of the topics covered in the Hindi textbooks. These books often provide detailed explanations, examples, and practice questions that can supplement your learning.

- Wider coverage: While the Hindi textbooks prescribed by CBSE provide a comprehensive overview of the syllabus, additional reference books can offer a wider coverage of the subject. They may include additional topics, examples, and exercises that can help you expand your knowledge.

- Alternate explanations: Different reference books may present the same concepts in different ways. This can be particularly useful if you find it difficult to grasp a certain topic from the textbook. Exploring different explanations can provide you with alternative perspectives, making it easier to understand and remember the content.

- Practice and reinforcement: Additional reference books often include extra practice exercises, sample papers, and solved examples. These can be used to reinforce your understanding and improve your problem-solving skills. The more you practice, the better prepared you will be for exams.

Tips for choosing additional reference books:

- Check the syllabus: Ensure that the reference book covers the entire CBSE Class 9 Hindi syllabus. It should include all the topics and chapters prescribed by the board.

- Read reviews: Look for reviews or recommendations from teachers, students, or educational platforms like EduRev. This can give you an idea of the quality and relevance of the book.

- Content alignment: Compare the content of the reference book with your Hindi textbooks. The book should align with the concepts and terminology used in the CBSE curriculum.

- Practice material: Consider reference books that provide ample practice material, including exercises, solved examples, and sample papers. This will help you reinforce the concepts and prepare for assessments.

Note: While using additional reference books can be beneficial, it is important to use them as a supplement to your Hindi textbooks, not as a replacement. The textbooks prescribed by CBSE are designed to meet the curriculum requirements, and it is essential to thoroughly study them.