Page 118 - ADVANCED MATH F.5

Form Five Form Five

Answers to Exercise 6.1

1. x = 8.1cm, h = 12.8676cm
2. VW 18.9148 units,= 20 units, UV = 40 units, 42.2949units
37.8297units,UW = 20 5 units,
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3. BD 13.4cm=

4. JK = 10 cm, KL = 10 cm, JL = 14.14 cm
169 169
5. cosecD = , secD =
119 120
1 2 2
6. (a) 1 12 (b) 5

7. M =  45 , N°  = 45°

8. 5 5 cm, 53.13 and 126.87° ° 10. 407 metres

9. PR 13.97 cm= 11. h = 46.86 metres

Trigonometric identities
Teaching steps
1. Design an activity to enhance students’ understanding on
deducing Pythagorean identities using Figure 6.2 in the Student’s
Book. Allow them through group discussions to share alternative
methods of deducing Pythagorean identities.

2. Use Examples 6.4 to 6.10 in the Student’s Book to engage
students in applying the Pythagorean identities to find solutions
of various trigonometric ratios problems. Engage students to
use mathematical software to verify the solutions to the given
examples.
3. Instruct students to attempt Exercise 6.2 in the Student’s Book.
Advise them to submit their work. Check the correctness of
their answers, and provide them constructive feedback.

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ADVANCED MATH F.5 TG CHAPTERS.indd 112
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