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General Mathematics Paper 2,May/June. 2008  
Questions: 1 2 3 4 5 6 7 8 9 10 11 12 13 Main
General Comments
Weakness/Remedies
Strength














question 9

(a) The triangle ABC has sides AB = 17m, BC = 12m and AC = 10m. Calculate the ;

(i) Largest angle of the triangle;

(ii) Area of the triangle.

(b) From a point T on a horizontal ground, the angle of elevation of the top R of a tower RS, 38 m high, is 63°. Calculate, correct to the nearest metre, the distance between T and S .


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Observation

Many of the candidates who attempted this question (9) used the Cosine formula but were not able to obtain the correct angle since it is an obtuse angle having a negative value of Cosine. Some candidates could not recognise the largest angle as the angle
, opposite the longest side.
Candidates attempted the (b) part on angle of elevation satisfactorily. They were able to draw the diagram which aided their ability to solve the problem.

 



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