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Sine and Cosine of Sum of Angles
Autor:
kosband
,
Tim Brzezinski
Topico(s):
Cosseno
,
Seno
,
Funções Trigonométricas
,
Trigonometria
GeoGebra
Here is a visual proof of the formulas for the sines and cosines of sums. It uses the properties of right triangles and rectangles.
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