(Sin 210° - cos 180°) / cos 60° =
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Pertanyaan
(Sin 210° - cos 180°) / cos 60° =
1 Jawaban
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1. Jawaban tiffennyrestika
sin 210 = sin (180 + 30) = - sin 30
sin 210 - cos 180/ cos 60 = -sin 30 - 0 / 1/2
= -1/2 / 1/2 = -1