I'm having trouble comprehending the cosine/sine rules. This portion of the course talks at length about when to use these rules, but I still don't get what they actually are. Is there somewhere else in the Mathematics course that explains this better? Did I miss something perhaps?
Core Mathematics - Cosine rule - example 2
Cosine rule - example 2
The orienteering course from the previous example is altered to the course
shown. Find the size of angle _A._
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