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GeoGebra
Reference angle for third quadrant
Author:
aras
It shows how the trigonometric ratios of a given angle A and those of A-
are related
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Question35 Figure
應用圓周公式：題 2
GREECE - Χρυσή τομή - Κατασκευή σημείου
Narrated Solution
trapezoid with 2 triangles on sides
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