This is a very useful on showing some easy ways of deriving how to get the exact Trig Ratios for 0, 30, 45, 60 and 90 degrees. I show simple proofs of all the exact ratios as well as summarizing the important exact ratios you should either memorize or easily derive on your own. They are very useful to know because you won't need to rely on a calculator all the time.
Video notes and playlist:
- PDF notes: [ Ссылка ]
- HIVE notes: Exact Trigonometry Ratios Part 1: 0, 30, 45, 60, and 90 Degrees
- Trigonometry playlist: [ Ссылка ]
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