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Pc 4.2 notes
 

Pc 4.2 notes

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Introduction to the unit circle

Introduction to the unit circle

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    Pc 4.2 notes Pc 4.2 notes Presentation Transcript

    • 4.2 The Unit CircleEssential Question:What is the unit circle and what do the points on itrepresent? 1
    • Special Right Triangles 1 1 1 2
    • Convert to Radians30o45o60o 3
    • The Unit Circle!-Applies x- and y-coordinates to"special angles"- All angles aremultiples of 30, 45,or 60 degrees- All points are"over 2" and havesquare root 4
    • Creating the Unit Circle:1) Start in Quad. I and with the y-coordinate of 0.2) Count to 4 with the y up to 90 degrees or π/2.3) Count back down on x from 0 to 4.4) Square root everything, then put over 2.5) Reflect points to the different Quadrants. 5
    • 6
    • The 6 Trigonometric FunctionsSo why do we need the unit circle? 7
    • a)b) 8
    • c)d) 9
    • 10
    • Assignment:4.2 p. 299 #1-51 (odd) 11
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    • 15