Tentukan hasil u.v jika diketahui a.|u|=4,|v|=2√2,dan cos<(u,v)=1/4√6 b.|u|=3√2,|v|=5√3,dan <(u,v)=45°
Matematika
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Pertanyaan
Tentukan hasil u.v jika diketahui a.|u|=4,|v|=2√2,dan cos<(u,v)=1/4√6
b.|u|=3√2,|v|=5√3,dan <(u,v)=45°
b.|u|=3√2,|v|=5√3,dan <(u,v)=45°
1 Jawaban
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1. Jawaban BLUEREAPER
u•v = |u||v| × cos θ
a) u•v = 4×2√2 × 1/4 √6 = 4√3
b) u•v = 3√2 × 5√3 × 1/2√2 = 15√3