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secondary 3 | E Maths
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Date Posted: 1 year ago
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Hi Nidia, for part (i), use cosine rule to find angle ABC and ACB, then use 180 degrees to minus both angles to get angle BAC. For part (ii), draw a line down to make it a right angle triangle so that we can use sine rule to find the height of the triangle before we use 1/2 X base X height to find the area of the triangle.
Date Posted:
1 year ago
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