Page 123 - ADVANCED MATH F.5

Form Five Form Five

to use scientific calculators and mathematical software to
verify the solutions of the given examples. Advise students to
share their findings through presentations.
8. Require students to attempt Exercise 6.5 in the Student’s Book.
FOR ONLINE READING ONLY
Advise them to submit their work, check the correctness of
their answers, and give them constructive feedback.

Answers to Exercise 6.5

1. (a) 0 , 112.62 , 360° ° ° (f) 188.4 , 319.72° °

(b) 53.1 , 323.1° ° (g) 101.34 , 355.4° °
(c) 48.4 , 205.34° ° (h) 36.9 , 241.92° °
(d) 119.56 , 346.7° ° (i) 80.72 , 234.04° °

(e) 114.2 , 335.7° ° (j) 36.87 , 126.87° °

2. (a) 30 , 90− ° ° (e) 24.3 , 114.29− ° °
(b) 76.71 , 150.45° − ° (f) 0 , 45 , 180° ° °

(c) 4.9 , 129.88− ° − ° (g) 8.3 , 155.43− °− °
(d) 20.52 , 28.11 , 159.48− ° ° °
(h) 180 , 106.85 ,− ° − ° − 90 , 16.85 , 0 , 73.16 , 90 , 163.16 , 180° − ° ° ° ° ° °

(i) 40.72 ,72.6− ° ° (j) 51.33 , 128.67° °

3. (a) Maximum 2, minimum − 2
Maximum occurs at 45°
Minimum occurs at 225°

(b) Maximum 2 − 3, minimum − 2 − 3 Maximum occurs
at 255° Minimum occurs at 75°

(c) Maximum 5, minimum 5− Maximum occurs at 143.13°
Minimum occurs at 306.87°

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Mathematics for Advanced Secondary Schools

30/06/2024 18:02:27
ADVANCED MATH F.5 TG CHAPTERS.indd 117
ADVANCED MATH F.5 TG CHAPTERS.indd 117 30/06/2024 18:02:27