Jawab :
1. cos 150 = -cos 30 = -1/2. akr 3
2. sin 225 = -sin 45 = -1/2. akr 2
3. tan 240 = tan 60 = 1/2
4. sec 240 = 1/(-cos 60) = 1/(-1/2) = -2
5. cosec 330 = 1/(-sin 30) = 1/(-1/2) = -2
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Jawab :
1. cos 150 = -cos 30 = -1/2. akr 3
2. sin 225 = -sin 45 = -1/2. akr 2
3. tan 240 = tan 60 = 1/2
4. sec 240 = 1/(-cos 60) = 1/(-1/2) = -2
5. cosec 330 = 1/(-sin 30) = 1/(-1/2) = -2