Trigonometric Identities Class 10 | Sirf 3 Formule = 12 Marks | CBSE 2027 Mission Boards

Trigonometric Identities (Class 10 Maths, Chapter 8) — poora chapter sirf 3 formule se. Teeno identities ka PROOF ek hi Pythagoras se nikalta hai, isliye ratne ki zaroorat hi nahi. Phir 3 rules jo har "Prove that" question kholte hain, aur 5 PYQ-style questions fully solved (MCQ se lekar 3-mark proof tak). Unit V Trigonometry = 12 marks out of 80 in the CBSE Class 10 board paper. 📌 SYLLABUS NOTE (CBSE 2026-27 rationalised): Trigonometric ratios of COMPLEMENTARY ANGLES (sin(90°−A) type) is DELETED from the Class 10 syllabus. Agar purani book se padh rahe ho to us topic par waqt mat lagao. Iss video mein sirf in-syllabus content hai. ⏱ TIMESTAMPS 0:00 Cold open — “Prove that LHS = RHS” wali problem 0:14 Aaj ke video mein kya hai 0:48 40-second recap: 6 trigonometric ratios 1:32 Identity 1 — sin²A + cos²A = 1 (proof) 2:18 Identity 2 — 1 + tan²A = sec²A (proof) 3:02 Identity 3 — 1 + cot²A = cosec²A (proof) 3:32 3 rules jo har proof kholte hain 4:18 Q1 · 1 mark MCQ — (1−cos²A)(1+cot²A) 5:03 Q2 · 2 marks — 3 cot A = 4 5:45 Q3 · 2 marks — sec θ + tan θ = 7/2 trick 6:32 Q4 · 3 marks PROOF — √((1+sinA)/(1−sinA)) 7:32 Q5 · 3 marks — “1 ko replace karo” trick 8:39 3 galtiyan + free worksheet + next video ✅ IS VIDEO MEIN • sin²A + cos²A = 1 — proof + exam forms • 1 + tan²A = sec²A — proof + validity condition • 1 + cot²A = cosec²A — proof + validity condition • 3 proof rules: ek side pakdo · sab sin-cos mein · conjugate trick • Q1 (1 mark MCQ) · Q2 (2 marks) · Q3 (2 marks) · Q4 (3-mark proof) · Q5 (3-mark proof) • 3 galtiyan jo sabse zyada marks kaat-ti hain 📥 FREE PRACTICE WORKSHEET Comment karo "TRIG" — main worksheet DM kar dunga. 🤖 24×7 DOUBT SOLVING — MyGyaanSaarthi AI Tutor Class 6-12 ke liye AI doubt solving, image question solver, personalised study planner aur parent progress reports. 7-day free trial: https://mygyaansaarthi.com Plans: https://mygyaansaarthi.com/buy-plan ▶ MISSION BOARDS 2027 — Class 10 Maths series, 2 videos har hafte (Tuesday + Friday) #1 Similar Triangles Part 1 — BPT / Thales theorem #2 Similar Triangles Part 2 — AA, SSS, SAS + 5 PYQs #3 Trigonometric Identities ← ye video #4 Trigonometric Proofs (Part 2) — agle Tuesday Subscribe karo aur bell icon dabao taaki koi video miss na ho. 🔔 #Class10Maths #CBSE2027 #Trigonometry #BoardExam #NCERT