GCSE Secondary Maths Age 13-17 - Pythagoras & Trigonometry: Trigonometry - Explained

The video tutorial covers circle geometry and trigonometry. It begins with an introduction to circle geometry, explaining the given measurements and angles. The tutorial then explains why angle BCD is 90 degrees using circle theorems. It proceeds to calculate the length of BC in a right-angled triangle using trigonometry, emphasizing the importance of not rounding intermediate results to avoid errors. The tutorial concludes with a detailed application of trigonometry to solve the problem, highlighting key steps and concepts.

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