Circular Measure and Trigonometric Ratios
Measure angles the way the circle itself does, and know sin, cos and tan of 30, 45 and 60 degrees by heart.
What this unit covers
Unit 6: Trigonometry and Complex Numbers
- 1 Circular Measure and Trigonometric RatiosMeasure angles the way the circle itself does, and know sin, cos and tan of 30, 45 and 60 degrees by heart. · 10 min
- 2 Trigonometric Identities and Compound AnglesOne identity from Pythagoras, a handful of addition formulas, and you can find sin 75 degrees exactly. · 10 min
- 3 Trigonometric Graphs, Equations and the Sine and Cosine RulesWaves that repeat every 360 degrees, equations with more than one answer, and triangles without a right angle. · 10 min
- 4 Complex NumbersWhat if negative numbers had square roots? Invent one, call it i, and every quadratic suddenly has two roots. · 16 min