Hello aspirant,

It is not possible to purse b.tech if you don't have mathematics in 12th standard.

As mathematics is necessary subject for b.tech . Yes it is possible to do b.tech if you have mathematics as additional subject in 12th standard.

The basic eligibility for this course is :-  Admission in these courses is a 45% of marks is compulsory in 12th Examination. The basic eligibility criteria for admission to these courses is a pass in 10+2 or equivalent exam with 45% marks in Physics, Mathematics, and Chemistry// Computer Science.

Please visit this link for more information.

https://www.careers360.com/courses/b-tech-in-computer-science

Hope this helps you

Feel free to ask any questions

All the best for your future