The diagram shows points A, B, C and D on horizontal ground.
20(a)Sine Cosine RulesEasy2 marks
Calculate the area of triangle ABC.
Answer
m2
20(b)Sine Cosine RulesMedium4 marks
Show that angle CAD=85.8∘, correct to 1 decimal place.
Your answer
0 words
20(c)Bearings 3d TrigonometryHard6 marks
There is a vertical mast at point B and a vertical mast at point D.
The height of the mast at point B=250m.
The height of the mast at point D=45m.
Calculate the angle of depression of the top of the mast at point D from the top of the mast at point B.