Section: Trigonometric Functions

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  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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