| MATHEMATICS |
WISKUNDE |
| GRADE 11 |
GRAAD 11 |
| MORE EXERCISES |
NOG OEFENINGE |
| Special angles |
Spesiale hoeke |
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In this exercise calculators may |
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Sakrekenaars mag nie in hierdie oefening |
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not be used. |
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gebruik word nie. |
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| 1. |
Write each of the following as the ratio of an |
1. |
Skryf elk van die volgende as die verhouding |
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acute angle and hence determine the |
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van 'n skerp hoek en bepaal vervolgens |
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function value : |
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die funksiewaarde : |
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1.1
sin 150°
1.2
cos 210°
1.3
tan 135°
1.4
sec 150°
1.5
cosec 315°
1.6
cot 240°
1.7
cos 225°
1.8
cosec 120°
1.9
cot 135°
1.10
sin 330°
1.11
cos 210°
1.12
sec 300°
| 2. |
Evaluate : |
2. |
Evalueer : |
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2.1
sin 30° cos 60° cot 45°
2.2
sec 30° cos 30° tan 60°
2.3
4 sin 60° + tan 45° + 2 cot 30°
2.4
sec2 0° + cos2 30° + cosec2 45°
cosec 120° tan 135° sin 150°
− sin 120° cos 150° + sec2 135° − cos 0°
2.5
——————————————
2.6
———————————————————
sec 150°
sin2 135° cosec 135°
cos 240° sin 330° tan 120°
sin 150° cos 225° sec 10°
2.7
——————————————
2.8
—————————————————
sin 150° tan 210° cos 120°
cosec 330° cosec 45° cosec 260°
sin 150° . cos 210°
sin 210° cos 300° cot 150°
2.9
—————————
2.10
——————————————
tan 300°
cos 120° cot 240° sin 330°
4
1
1
2.11
— cos2 330° − — sec2 45° − — sin 60°
3
2
3