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4.2TheUnitCircle - 4.2 The Unit Circle Thursday 3:06 PM...

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Agenda: 1. Warmup 2. Lesson: 4.2 Unit Circle ______________________________ Warmup Sketch the angle in standard position and list the quadrant it lies in. Determine two coterminal angles (one positive and one negative). And convert to degrees, rounded to the nearest hundredth ( what does hundredth mean? ) 1. 2 (what unit is this angle measure?) ______________________________ Lesson: 4.2 The Unit Circle Goal: Use a unit circle to evaluate trigonometric functions DOD Unit Circle: Circle of radius 1, center at origin ( ) Remember whiteboard pens on Monday! Also, there will be a homework check on Monday. 4.2 The Unit Circle Thursday, August 18, 2011 3:06 PM Ch_1 Page 1
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Trigonometric Functions Let θ be a real number and the point on the unit circle corresponding to θ . i multiples
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