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.

What is the relationship between the angle at the center and the angle at the circumference?

How do you ensure accuracy when performing calculations with rounded numbers?

What is the final answer for the length of DB in centimeters?