For a score of 41 marks in JEE Main, your expected percentile is approximately 73 to 80 percentile, depending on the difficulty of your specific exam shift. Historical data shows that marks in the range of 41–50 typically translate to a percentile between 73.28 and 80.98.

Admission to Engineering colleges  are based on Ranks. Based on the trends of the past years  here is the Trinity College of Engineering cutoff - https://www.careers360.com/colleges/trinity-college-of-engineering-thiruvananthapuram/cut-off