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Trigonometry - The Trig Ratios, sin x, cos xand tan x : ExamSolutions

In this tutorial you are shown how the sin, cos and tan ratios compare two sides of a right angled triangle.. You need to know this before calculating lengths and angles of right angled triangles. To see this video and other go to ExamSolutions at http://www.examsolutions.co.uk/
Length: 07:39

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