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TRIGONOMETRY Angle Measures Trigonometric Functions The magic identity The Addition Formulas Double-Angle and Half-Angle Formulas Product and Sum Formulas Trigonometric Equations Table of Trigonometric Identities SOLVING TRIGONOMETRIC EQUATIONS CALCULUS AND TRIGONOMETRY The Derivatives of Trigonometric Functions HYPERBOLIC TRIGONOMETRY The Hyperbolic Functions The Inverse Hyperbolic Functions