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Section: Trigonometric Functions

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Table of Contents

1. Definition: Cosine of a Real Variable
2. Definition: Sine of a Real Variable
3. Definition: Tangent of a Real Variable
4. Proposition: Continuity of Cosine and Sine
5. Proposition: Pythagorean Identity
6. Proposition: Additivity Theorems of Cosine and Sine
7. Proposition: Infinite Series for Cosine and Sine
8. Proposition: Special Values for Real Sine, Real Cosine and Complex Exponential Function
9. Proposition: Inverse Cosine of a Real Variable
10. Proposition: Inverse Sine of a Real Variable
11. Proposition: Inverse Tangent of a Real Variable

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