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8 x sin 30 = 4
8 x cos 30 = 4 akar 3
ingat sin 30 = 1/2
cos 30 = 1/2 akar 3
jadi jawabannya E
8 . 1/2 = 4
8 cos 30°
8 . 1/2 . √3
4√3 atau 4 . 1,73 = 6,92
jadi jawabannya 4N dan 4√3N
ingat :
cos 30° = 1/2√3
sin 30° = 1/2
√3 = 1,73