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GCSE Edexcel Trigonometry - Edexcel Trigonometry in 3 dimensions - Higher The three trigonometric ratios; sine, cosine and tangent are used to calculate angles and lengths in right-angled triangles.
GCSE Edexcel Trigonometry - Edexcel Calculating an angle The three trigonometric ratios; sine, cosine and tangent are used to calculate angles and lengths in right-angled triangles.
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