Hi Kunal,

No, its not compulsary to study Maths before the BCA/MCA course but if you have maths, then it is not any harm in that. It is only an add-on to have maths in 12th before pursuing BCA or during BCA studying Maths will help you in programming and several other computational calculation works.

Feel free to ask doubts in the Comment Section.

I hope this information helps you.

Good Luck!