ABSTRACT
Figure RT8.11 21. Evaluate, correct to 3 significant figures,
3 tan81.27◦ − 5cos7.32◦ − 6sin54.81◦ (2) 22. In triangle ABC in Fig. RT8.12, find lengths AB
and AC , correct to 2 decimal places. (4) A
Figure RT8.12 23. From a point P, the angle of elevation of a 40m
high electricity pylon is 20◦. How far is point P from the base of the pylon, correct to the nearest metre? (3)
For lecturers/instructors/teachers, fully worked solutions to each of the problems in Revision Test 8, together with a full marking scheme, are available at the website:
