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Trig Identity (4) - Geometric Investigation
Author:
Tim Brzezinski
Topic:
Cosine
,
Geometry
,
Sine
,
Trigonometric Functions
,
Trigonometry
Drag the point on the semicircle anywhere you can. Then slide the slider slowly.
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What is the area of the square in the upper left corner?
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What is the area of the shaded rectangle on the bottom right (in terms of θ)?
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What is the area of the unshaded rectangle on the bottom left (in terms of θ)?
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Write an equation that describes the relationship among these 3 areas from the animation you saw above.
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