- Groups presented Cosine and Sine rules, and asked questions
Cos rule:
1. Included angle - The angle connected by two sides. etc A connected by b and c in the diagram below
2. Relation between pythagoras theorem and cosine rule:
c^2 = a^2 + b^2 - 2abcos90
As cosine 90 is 0,
c^2 = a^2 + b^2
- Derivation of area formula: 1/2 ab sinC
- Went through a few questions for trigonometry
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