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Applying Pythagoras’ theorem and the sine, cosine, and tangent ratios for acute angles to the calculation of a side or of an angle of a right-angled triangle extend sine and cosine functions to angles between 90° and 180° solved problems using the sine and cosine rules for any triangle and the formula area of triangle = 2by1 ab sin C solved simple trigonometrical problems in three dimensions solved trigonometrical problems in two dimensions involving angles of elevation and depression interpret
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2021/2022
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