The Cosine Rule | Grade 7 Maths Revision | GCSE Maths Tutor

A video revising the techniques and strategies for using the cosine rule for side lengths and angles.

This video is part of the Pythagoras & Trigonometry module in GCSE maths, see my other videos below to continue with the series.

Revision Videos:

The Entire 9-1 GCSE Maths Exam in only 2 hours!! Higher and Foundation Revision - https://youtu.be/8A3crqKb13I

Everything for a Grade 6-9 in your GCSE Maths Exam! Higher Maths Exam Revision | Edexcel AQA & OCR - https://youtu.be/o9VuZhCqR2U

Pythagoras and Trigonometry Series:

All of Trigonometry in 20 Minutes!! Foundation & Higher Grades 4-9 Maths Revision | GCSE Maths Tutor - https://youtu.be/tUWzTVItOTo

Part 1 - Pythagoras - https://youtu.be/JCG4HHGVqiY

Part 2 - Trigonometry (Side Lengths) - https://youtu.be/x3Cd8HJCvII

Part 3 - Trigonometry (Angles) - https://youtu.be/LhswRR8jmks

Part 4 - Finding the Exact Values (Higher Only) - https://youtu.be/wBX0YXKThBs

Part 5 - Sine Rule (Higher Only) - https://youtu.be/bR5vN_IGZ9s

Part 6 - Cosine Rule (Higher Only) - https://youtu.be/FPVqgxify78

Part 7 - Area of a Triangle (Higher Only) - https://youtu.be/8fzPUPnFy-w

Part 8 - Proving the Trigonometric Rules (Higher Only) - https://youtu.be/C0kbu8x-u4k

Part 9 - Circle Sectors with Trigonometry (Higher Only) - https://youtu.be/24Zmm0mxZ2A

Part 10 - 3D Trigonometry (Higher Only) - https://youtu.be/NT_NPUx16_A

These are the calculators that I recommend:

Casio fx-83GTX Scientific Calculator, Black - https://amzn.to/2P2cyGG
Casio Fx-991ex Scientific Calculator Fx 991 Ex - New + 552 Function - Classwiz - https://amzn.to/2sw2Moz

🔹 Watch the video
🔹 Make notes
🔹 Practice the questions
🔹 Mark your work
🔹 Review what you have learnt on the exam questions

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