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Chapter 4. Trigonometric Functions. Section 4.1, Figure 4.1, Terminal and Initial Side of an Angle. Section 4.1, Figure 4.2, Standard Position of an Angle. Section 4.1, Figure 4.3, Positive and Negative Angles. Section 4.1, Figure 4.4, Coterminal Angles.
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Chapter 4 Trigonometric Functions
Section 4.1, Figure 4.1,Terminal and Initial Side of an Angle
Section 4.1, Figure 4.13,Common Degree Measures on the Unit Circle
Section 4.3,Right Triangle Definitions of Trigonometric Functions
Section 4.4, Figure 4.33,Signs of the Trigonometric Functions
Section 4.5, Figure 4.44,Key Points in the Sine and Cosine Curves
Section 4.6, Figure 4.61,Graphs of Cosecant and Secant Functions
Section 4.6, Figure 4.67,Graphs of Basic Trigonometric Functions
Section 4.7, Figure 4.71,Graphs of Inverse Trigonometric Functions