Math Trigonometry Set B 08 Non Right Angled Triangles Exact Values and the Cosine Rule Mostly for Year/Grade 10 and 11

Once students reasonably understand mathematical concepts like the Sine Rule and the Cosine Rule, the next problem is 'getting mixed up' in when and how to use which concept. Here is a case where we can use 'exact' values.

After 40 years of enjoyable and rewarding teaching, I still love and continue to teach. It still amazes me how I continue to still think of better ways of teaching mathematical concepts and I also continue to discover methods of explaining things that help students 'better' understand and become more successful at remembering the concepts.

A word of warning from what I have repeatedly seen over the years - most of my videos are placed in a logical or reasonably sequential order and if you watch the first or second video in a playlist and feel comfortable with the concepts, please go to the last video in the playlist to check if you really are okay.

Each video in a playlist usually becomes progressively more complex and the 'latter' or 'last' video will often contain common assessment questions where students are known to make errors. I also often include some revision / consolidation / mixture videos in the playlist which I know are crucial to assist with student success in assessments.

I hope that you find this very helpful and a blessing in your studies.