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Sections
Trigonometric Functions
Pick a section. You read the idea first, then answer questions on it.
1. From triangle ratios to circle functions
1 idea
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2. Measuring the angle: degrees and radians
3 ideas
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3. Signs, quadrant by quadrant
2 ideas
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4. The values worth knowing cold
1 idea
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5. Turning the other way — odd and even
1 idea
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6. The Pythagorean identities
2 ideas
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7. Why everything repeats
1 idea
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8. Combining angles
4 ideas
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9. Solving means naming every repeat
2 ideas
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10. One picture, every idea
1 idea
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11. Two traps this chapter sets
2 ideas
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12. Practice set
4 ideas
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13. Chapter-end problems
1 idea
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