CBSE 2026 Board Exam: T-Ratios of Complementary Angles | Trigonometry Summary Part 3

Welcome back to Mindsetting Classes! In Part 3 of our Trigonometry Summary Series, unlock the secrets of complementary angles and how trigonometric ratios for these angles relate in board exams. This short video covers: ✅ What are complementary angles? ✅ How T-ratios like sin, cos, tan, cot, sec, and cosec relate for θ and 90°–θ ✅ Why sin θ equals cos(90°–θ) and the complete set of complement formulas ✅ How to use complementary angle tricks to solve board questions quickly ✅ Exam-focused examples and memory tips CHAPTERS: 0:00 - Introduction 0:15 - What are Complementary Angles? 0:50 - sin θ = cos(90°-θ) Formula 1:20 - tan θ = cot(90°-θ) Formula 1:50 - sec θ = cosec(90°-θ) Formula 2:20 - Real Examples (cos 30° = sin 60°) 2:50 - sec 49° = cosec 41° Example 3:15 - Key Takeaways 3:35 - Call to Action 📊 Why this matters for your CBSE 2026 Boards: • Complementary angle questions are favorites in exams • These concepts unlock shortcut methods for trigonometric problems • Build strong fundamentals for further trigonometric identities 🔔 Don’t miss previous videos: Part 1: T-Ratios Fundamentals    • CBSE 2026 Board Exam: T-Ratios Summary in ...   Part 2: Values of T-Ratios for Special Angles    • CBSE 2026 Board Exam: T-Ratios of Special ...   Part 3: Complementary Angles (this video!) 💡 Subscribe and turn on notifications so you never miss a video! 👇 Drop a comment: Which complementary angle formula did you find most useful today? Like • Share • Subscribe for more board exam-ready summaries with Mindsetting Classes! #maths #education #study #summary #trending #trigonometry #boardexampreparation #cbse #cbse2026 #complementaryangles #MindsettingClasses #TRatios #trigonometri #class #class10