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Pertanyaan

Jika vektor a dan b membentuk sudut sebesar α ,maka cos α = ...

Jika vektor  dan  membentuk sudut sebesar , maka   

  1. table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell fraction numerator straight a with bar on top times straight b with bar on top over denominator open vertical bar straight a with bar on top close vertical bar open vertical bar straight b with bar on top close vertical bar end fraction end cell end table 

  2. table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell fraction numerator straight a with bar on top cross times straight b with bar on top over denominator open vertical bar straight a with bar on top close vertical bar open vertical bar straight b with bar on top close vertical bar end fraction end cell end table 

  3. table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell fraction numerator straight a with bar on top plus straight b with bar on top over denominator open vertical bar straight a with bar on top close vertical bar open vertical bar straight b with bar on top close vertical bar end fraction end cell end table 

  4. table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell fraction numerator open vertical bar straight a with bar on top close vertical bar open vertical bar straight b with bar on top close vertical bar over denominator straight a with bar on top times straight b with bar on top end fraction end cell end table 

  5. table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell fraction numerator open vertical bar straight a with bar on top close vertical bar open vertical bar straight b with bar on top close vertical bar over denominator straight a with bar on top plus straight b with bar on top end fraction end cell end table 

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N. Sari

Master Teacher

Mahasiswa/Alumni Universitas Nasional

Jawaban terverifikasi

Jawaban

jawaban yang benar adalah A.

jawaban yang benar adalah A.

Pembahasan

Untuk mengetahui sudut antar vektor dapat dilakukan sebagai berikut : Maka, . Oleh karena itu, jawaban yang benar adalah A.

Untuk mengetahui sudut antar vektor dapat dilakukan sebagai berikut :

table attributes columnalign right center left columnspacing 0px end attributes row cell straight a with bar on top times straight b with bar on top end cell equals cell open vertical bar straight a with bar on top close vertical bar open vertical bar straight b with bar on top close vertical bar cos space alpha end cell row cell cos space alpha end cell equals cell fraction numerator straight a with bar on top times straight b with bar on top over denominator open vertical bar straight a with bar on top close vertical bar open vertical bar straight b with bar on top close vertical bar end fraction end cell end table

Maka, table attributes columnalign right center left columnspacing 0px end attributes row cell cos space alpha end cell equals cell fraction numerator straight a with bar on top times straight b with bar on top over denominator open vertical bar straight a with bar on top close vertical bar open vertical bar straight b with bar on top close vertical bar end fraction end cell end table.

Oleh karena itu, jawaban yang benar adalah A.

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