The unit circle and sine and cosine graphs, with the point a = 90°
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Ricardo NEMIROVSKY, Professor (Full), Professor, Manchester Metropolitan University, Manchester, MMU, Education and Social Research Institute
Trigonometry: Graphing the Sine, Cosine and Tangent Functions - Owlcation
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Tracy NOBLE, Education Research Center
How do you find sine, cosine, tangent of 90^@ or 180^@ using the unit circle?
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Tracy NOBLE, Education Research Center