The Maths Prof: The Cosine Rule
In this lesson I show you how to use The Cosine Rule to find the LENGTH of a side in a triangle and then, an ANGLE.
If you want to skip ahead to finding an ANGLE go to 5:15
Another lesson to follow soon with some more difficult examples!
I hope you find the lesson useful! Subscribe to my YouTube channel to stay up to date with new uploads and follow me on Instagram @themathsprof for more maths! :-)