Hello aspirant
Books best for class xi are
First complete the ncert book . Complete syllabus of class xi.
Start solving R.D. Sharma , a standard book for class xi.
For clearing theoretical concepts as concepts should be crystal clear then only you can solve MCQs. So refer M.L.Khanna, A Dasgupta, ARIHANT series.
IA Marin , Burman , Pishkunov for CalculusHall & Knight for Algebra
For jee level preparation you must refer Balaji publications objective Mathematics by J. P. Arya.
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