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- GCE O-Level A Maths
- Trigonometric Ratios and Angle Measure
Find the exact value of trigonometric ratios
- Lesson: 1a19:24
- Lesson: 1b10:58
- Lesson: 1c9:37
- Lesson: 1d11:29
Find the exact value of trigonometric ratios
Basic Concepts: Solving expressions using 45-45-90 special right triangles , Solving expressions using 30-60-90 special right triangles , Reference angle, ASTC rule in trigonometry (All Students Take Calculus)
Lessons

- 1.Find the exact value of all six trigonometric ratios, then make a conclusion
which primary trigonometric ratios (sin θ,cosθ,tanθ) are positive in each
quadranta)θ=30°b)θ=120°c)θ=225°d)θ=300°
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23.
Trigonometric Ratios and Angle Measure
23.1
Angle in standard position
23.2
Coterminal angles
23.3
Reference angle
23.4
Find the exact value of trigonometric ratios
23.5
ASTC rule in trigonometry (All Students Take Calculus)
23.6
Unit circle
23.7
Converting between degrees and radians
23.8
Trigonometric ratios of angles in radians
23.9
Radian measure and arc length