ubahlah dalam sudut lancip. a.sin 150° b.cos 135° c.tan 240° d.sin 315° e.cos 1110°
Matematika
raniriskifatimah
Pertanyaan
ubahlah dalam sudut lancip. a.sin 150° b.cos 135° c.tan 240° d.sin 315° e.cos 1110°
1 Jawaban
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1. Jawaban JinnyJBR
a. sin 150° = sin (180° - 30°) = sin 30° = 1/2
b. cos 135° = cos (180° - 45°) = -cos 45° = -akar 2/2
c. tan 240° = tan (270° - 30°) = tan 30° = akar 3/3
d. sin 315° = sin (360° - 45°) = -sin 45° = -akar 2/2
e. cos 1.110° = cos (3x360°+30°) = cos 30° = akar 3/2