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Chapter 4 Circular and Trigonometric Functions. Chapter 4.1 The Unit Circle. Unit Circle. Example 4.1.1. Arcs. Angles. Degrees. Radians. Degrees and Radians. Example 4.1.2. Arc Length. Arc Length in a Unit Circle. Time to Think!!!.
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Time to Think!!! • Express each of the following angles in radian measure: 1) 30º 3) 165.7º 2) -135º 4) -360.9º • Express each of the following angles in degree measure: 1) π/3 rad 3) 4/3 rad 2) 5π/9 rad 4) - π/8 rad