The adjacent side (\(a\)) is next to the angle in question (\(x\)). The trigonometric ratios for the angles 30°, 45° and 60° can be calculated using two special triangles. An equilateral ...

It may be necessary to use Pythagoras' theorem and trigonometry ... angle in between are required. Calculate the area of the triangle. Give the answer to 3 significant figures. Use the formula ...