It would be difficult if you are not so good at Maths. And it also depends in which school you have completed your 11th standard. If you have studied in NCERT/CBSE syllabus, it may not be so difficult for you, as few of XIIth standard Maths, you would have read basics of that in your XI school itself.
Even though, if you are finding it difficult initially, gradually you can overcome it with your hardwork. To become expert in Mathematics the only way is to make more practice. Solve varieties of the problems. Revise the problems you solved which you feel is very important from exams point of view.
Very important fact about mathematics is that unlike other subjects, you canĂ¢??t mugup the topics and can score in exams. You have to understand the maths thoroughly, go deeper in your problems analysis. Try to understand 100% of all the steps involved in solving mathematical problems. That will help you lot and perfect understanding, automatically reduces your efforts, and no need to mug up, no need to revise it again and again also.