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mathematicsprinted 114 · PDF 115
165 pagesrevision 46935
printed 114 · PDF 115
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Q2a - Using the vertical triangle ABE, 2 side lengths and its area are known.
The angle between the lengths needs to be proven. Use the formula for the
area of a triangle to prove the angle.
Q2b - In the triangle ABE, 2 side lengths and the angle opposite to the
unknown side is known. The cosine rule can be applied to find EA.
Q2c - Shortest distance is the perpendicular distance. Another right angled
triangle is formed from which the required length can be found.
Q2d - Another triangle (FYB) needs to be formed for this question. Assume
point Y is such that FY is the shortest distance from point F to line DC. This