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Lesson
Trigonometric ratios
Use sine, cosine, and tangent in right triangles.
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Lesson Notes
Section 1 / 7
- Use SOH-CAH-TOA to set up ratios.
- Solve for missing sides or angles.
- Interpret ratios in context.
Short segments for focus-friendly pacing.
Key Points
- SOH-CAH-TOA
- Opposite is across from the angle
- Adjacent touches the angle
- Hypotenuse is longest side
- Use inverse trig to find angles
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External Links
Khan Academy: Right Triangles and Trig (External)
External Khan Academy right-triangle and trig practice. Link-only with attribution.
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