Secondary 3 Elementary Math (15 year olds)
Topic 6.4 - Cosine Rule
Topic 6.4. Further Trigonometry – The Cosine Rule
What happens if the length of two sides of a triangle and an included angle are given? Can you use the Sine rule in this case to find another side or angle?
This video is split into two parts:
1) We show you how to apply the cosine rule
2) A simple way to derive the cosine rule
ManyTutors Academy provides free math lessons to the world based on the official Singapore Math syllabus. See how Singapore students learn math!
Feel free to leave comments and I will help when I can.
This Secondary 3 Elementary Maths video series is EXACTLY what Singapore students go through when they are 15 years old. We will provide free math videos to the world based on the entire official Singapore Math syllabus.
If you are a Singapore student who did not manage to follow a specific topic, you can catch up using these video lessons too.
Secondary 3 E-Maths (For 15 year olds)
This course is currently ongoing, I will try to upload a new video each week.
(Optional): We are using the Shinglee New Syllabus Mathematics 3 (7th edition) for Secondary 3 students and you may want to buy this textbook if you are outside Singapore. Otherwise, you will already have the textbook if you are schooling in Singapore.
New Syllabus Mathematics is a series of textbooks specially designed to provide valuable learning experiences to engage the hearts and minds of students sitting for the GCE O level examination in Mathematics. Included in the textbooks are Investigation, Class Discussion, Thinking Time, Journal Writing, Performance Task and Problems in Real-world Contexts to support the teaching and learning of Mathematics.
ABOUT MANYTUTORS ACADEMY
ManyTutors Academy provides free math education to the world based on the official Singapore Math syllabus.
Inspired by the Khan Academy, we will attempt to make the world renowned Singapore’s education accessible to the rest of the world. Students who follow our entire series should be able to take the Cambridge O-Levels examinations or the K1-K12 exams in the own country.
- Lectures 30
- Quizzes 0
- Duration 3 hours
- Skill level Secondary 3
- Language English
- Students 273
- Assessments Self