Formula for finding the Angle Between Two Intersecting Lines — IITM BS previous year questions

Formula for finding the Angle Between Two Intersecting Lines is part of Slopes and Angles of Lines, Week 2 in Mathematics 1. Prasnya files every IIT Madras BS previous year question from this subtopic here, each one with a worked explanation. Take the whole set as a timed mock and you get accuracy, pacing and per-question analysis back.