Trigonometry wrap-up

We covered all the basics of trigonometry in our last class.
The 2006 trigonometry question shouldn't pose any major difficulty.
For part a) draw a rough diagram and identify which side is which before you draw it exactly.
For part b) remember that you need SAS to get the area of the triangle, so you need to find a missing angle first.
For part c) part (i) is straightforward sine rule (after finding an angle to complete an angle/opposite side pair). For part (ii) there are a few ways you could do this either using area of a triangle or using the basic ratios for right-angled triangles (the shortest line from f to the opposite bank of the river is perpendicular to the river bank).