Coba perhatikan gambar di samping. B (b1, b2, b3) b O theta
Saluran Edukasion 2023-12-28T16:16:43
Coba perhatikan gambar di samping. B (b1, b2, b3) b O theta a A(a1, a2, a3) Buktikan kebenaran rumusan a.b=|a||b|cos theta. (Petunjuk: gunakan aturan kosinus)
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