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LESSON 4.1
Right Triangle Trigonometry

LESSON 4.3
Trigonometric Functions on the Unit Circle
Lesson Overview:
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a. Solving the Unit Circle
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Part A: The Unit Circle and How to Fill It Out
In mathematics, a unit circle is a circle with a radius of one. Frequently, especially in trigonometry, the unit circle is the circle of radius one centered at the origin in the Cartesian coordinate system in the Euclidean plane.
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The Unit Circle:​
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Here is a Youtube Video that can help you to fill it in:​
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The Unit Circle on the SAT
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The Unit Circle Real World
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Conclusion:
You should be able to find the exact value of degrees and radians based on the information you know about the unit circle and the rules that go along with each quadrant.
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