Hello Sathvika

These are some courses you can do in B.Tech without Math:

1. B.Tech in Biotechnology
2. B.Tech in Food Technology
3. B.Tech in Biomedical Engineeering
4. B.Tech in Agricultural Engineering
5. B.Tech in Environmental Engineering

Some colleges in Tamil Nadu for these colleges are:

1. SASTRA University. Thanjavur
2. St. Peter's University, Chennai
3. Prathyusha Engineering College, Tiravallur
4. Udaya School of Engineering, Kanyakumari
5. Vinayaka Mission's Kirupanada Variyar Engineering College, Salem

Hope this answer helps! Thank You!!!