Lesson of 18/10/06-Cosine law
In today's lesson we learned about Cosine law and how to use it to solve problems.
We use the Cosine law when you are given 1 angle and 2 sides next to it in a triangle (not a right angle triangle!) and you're trying to find the opposite. The equation is:
 = c^2)
when a = length of side 1 b = length of side 2 C = the angle you know c = the opposite/the length youre solving for.
when a = length of side 1 b = length of side 2 C = the angle you know c = the opposite/the length youre solving for.
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