The chapter trigonometry in RS Aggarwal book (of class 11th) is divided into 6 sub-chapters. But its chapter 5 ( Solution of triangles ) and 6 ( Graphs of trigonometric functions ) are not the topics of NCERT Book.

Now my question is: Should I study these two chapters (5 &6 of RS Aggarwal) as these are not in NCERT Book?

Dear student, 
you can study those topics also, it will be beneficial for your many competitive exams.
If you have any doubt , then do get back to us.

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yes you should must practice on these topics it will lead to exercise ur mind 

it will also increase ur knowledge and u will get a brilliant in trigno.

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