Скачать или смотреть 24 Trigonometric Identities Proof | Class 10 Maths | Important Trigonometry Questions | SEE/NEB Math

24 Trigonometric Identities Proof | Class 10 Maths | Important Trigonometry Questions | SEE/NEB Math


In this video, we solve and prove some important trigonometric identities step by step.
These problems are taken from Class 10 Mathematics (Chapter: Trigonometric Identities) and are very useful for board exams and entrance preparation.

Questions Covered in This Video:
Prove that: sin10° * sin50° * sin70° = 1/8
Prove that: 8 * cos20° * cos40° * cos80° = 1
Prove that: cos40° * cos80° * cos160° = -1/8
Prove that: sin20° * sin30° * sin40° * sin80° = (√3)/16
Prove that: sin10° * sin50° * sin60° * sin70° = (√3)/16
Prove that: cos20° * cos40° * cos60° * cos80° = 1/16
Prove that: cos10° * cos30° * cos50° * cos70° = 3/16
Prove that: cos12° * cos24° * cos48° * cos84° = 1/16

📚 Topics Explained:
Trigonometric product identities
Cosine and secant relationships
Cosecant and double-angle formulas
Step-by-step simplification for proofs
Board exam–level trigonometric questions

💡 Watch till the end to understand each proof clearly!
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