JEE Advanced requires you to be smart in your preparation as well as in the way that you solve the exam paper. Even after knowing everything, a lot of aspirants mess things up during the exam either due to pressure or due to poor time management. One needs to know the set of chapters that should be attempted first. Time management should be done very carefully in mathematics especially because the paper is generally lengthy or too tough, but scoring at the same time. Trigonometry is one such chapter that can possibly fetch you easy marks if done with proper logic and care. You can attempt questions from this chapter earlier and also, do try option elimination first when you see the questions from trigonometry.