Pertanyaan

Jika ∣ ∣ u ⇀ ∣ ∣ = 4 dan ∣ ∣ v ⇀ ∣ ∣ = 5 serta sudut antara

Jika $∣ ∣ u ⇀ ∣ ∣ = 4 dan ∣ ∣ v ⇀ ∣ ∣ = 5$ serta sudut antara $\overset\rightharpoonup{\mathrm u}\;\mathrm{dan}\;\left|\overset\rightharpoonup{\mathrm v}\right|\;\mathrm{adalah}\;60^\textdegree,\;\mathrm{Hasil}\;\left|\overset\rightharpoonup{\mathrm u}-\overset\rightharpoonup{\mathrm v}\right|\;\mathrm{adalah}\;....$

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Jawaban terverifikasi

Jawaban

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Hasil space open vertical bar straight u with rightwards harpoon with barb upwards on top minus straight v with rightwards harpoon with barb upwards on top close vertical bar equals square root of 21

Pembahasan

Ingat rumus berikut! Dengan rumus di atas, didapat perhitungan sebagai berikut. Dengan demikian, .

Ingat rumus berikut!

vertical line u minus v vertical line squared equals vertical line u vertical line squared plus vertical line v vertical line squared minus 2 vertical line u vertical line vertical line v vertical line cos alpha

Dengan rumus di atas, didapat perhitungan sebagai berikut.

Dengan demikian, Hasil space open vertical bar straight u with rightwards harpoon with barb upwards on top minus straight v with rightwards harpoon with barb upwards on top close vertical bar equals square root of 21 .