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mathematicsprinted 117 · PDF 118
165 pagesrevision 46935
printed 117 · PDF 118
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Q5a(i) - Cosine law will be applied because 2 sides and the angle in between
them is known.
Q5a(ii) - The vertical triangle BAX will now be used. A side and an angle is
known, the other side can easily be found by using tan.
Q5a(iii) - The other triangle, YAC, is now being used. 2 lengths, on either side
of the right angle, are known and the area is asked for. Plug in the values of
the lengths into the formula for the area of a right angle triangle to get the final
answer.