Scoring 99+ marks in Mathematics section of JEE Main and Advanced is a tough nut to crack. How? Year by Year, this section is covering complex in nature and time-consuming questions. To tackle such questions in 2025 exams, Skills in Mathematics series for JEE Main and Advanced is revamped and revised as per all the changes made in JEE syllabus & pattern in recent years. This edition for ''Trigonometry'' includes these following features: Completely updated theory as per JEE syllabus & Pattern Each chapter divided into small milestones with practice exercise in each milestone Theory of each milestone is more precise with- JEE FOCUS POINTS: A collection of key points with support videos from JEE preparation point of view, JEE SPIKE: Most valuable pointers segregated for JEE preparation, JEE SCANNER: JEE Main and Advanced PYQs with theory and additional practice through skills builders Solved examples of all JEE types just after completion of theory 3 Exercises at the end of each chapter, PRACTICE MILESTONE 1: JEE Main Pattern Exercises, PRACTICE MILESTONE 2: JEE Advanced Pattern Exercises, PRACTICE MILESTONE 3: Challenging Problems Exercises Previous Years' Questions asked in JEE Main, Adv., and AIEEE in all the exercises Supportive videos, online PYQs practice, chapter tests, mock tests as digital enhancements for improvised learning and assessment