Iklan

Iklan

Pertanyaan

tentukan besar sudut yang dibentuk oleh kedua vektor berikut. b. a = − j ​ dan b = j ​

tentukan besar sudut yang dibentuk oleh kedua vektor berikut.

b.  dan  

Iklan

W. Lestari

Master Teacher

Mahasiswa/Alumni Universitas Sriwijaya

Jawaban terverifikasi

Jawaban

besar sudut antara dan adalah .

besar sudut antara begin mathsize 14px style a with rightwards arrow on top equals negative j with rightwards arrow on top end style dan begin mathsize 14px style b with rightwards arrow on top equals j with rightwards arrow on top end style adalah begin mathsize 14px style 180 degree end style.

Iklan

Pembahasan

Ingat kembali: Maka: Sehingga: Jadi, besar sudut antara dan adalah .

Ingat kembali:

begin mathsize 14px style cos space theta equals fraction numerator a with rightwards arrow on top times b with rightwards arrow on top over denominator open vertical bar a with rightwards arrow on top close vertical bar times space open vertical bar b with rightwards arrow on top close vertical bar end fraction end style 

Maka:

begin mathsize 14px style a with rightwards arrow on top equals negative j with rightwards arrow on top space rightwards arrow space a with rightwards arrow on top equals open parentheses table row 0 row cell negative 1 end cell end table close parentheses b with rightwards arrow on top equals j space rightwards arrow space b with rightwards arrow on top equals open parentheses table row 0 row 1 end table close parentheses end style 

Sehingga:

begin mathsize 14px style cos space theta equals fraction numerator a with rightwards arrow on top times space b with rightwards arrow on top over denominator open vertical bar a with rightwards arrow on top close vertical bar times space open vertical bar b with rightwards arrow on top close vertical bar end fraction cos space theta equals fraction numerator open parentheses table row 0 row cell negative 1 end cell end table close parentheses times space open parentheses table row 0 row 1 end table close parentheses over denominator square root of 0 squared plus open parentheses negative 1 close parentheses squared end root times space square root of 0 squared plus 1 squared end root end fraction cos space theta equals fraction numerator 0 plus open parentheses negative 1 close parentheses over denominator square root of 0 plus 1 end root times space square root of 0 plus 1 end root end fraction cos space theta equals fraction numerator 0 minus 1 over denominator 1 times space 1 end fraction cos space theta equals fraction numerator negative 1 over denominator 1 end fraction cos space theta equals cos space 180 degree space space space space space space theta equals 180 degree end style 

Jadi, besar sudut antara begin mathsize 14px style a with rightwards arrow on top equals negative j with rightwards arrow on top end style dan begin mathsize 14px style b with rightwards arrow on top equals j with rightwards arrow on top end style adalah begin mathsize 14px style 180 degree end style.

Perdalam pemahamanmu bersama Master Teacher
di sesi Live Teaching, GRATIS!

60

Iklan

Iklan

Pertanyaan serupa

Diketahui vektor u = ⎝ ⎛ ​ 2 − 1 1 ​ ⎠ ⎞ ​ dan v → = ⎝ ⎛ ​ 7 0 1 ​ ⎠ ⎞ ​ . Tentukan sudut antara u dan v .

2

5.0

Jawaban terverifikasi

RUANGGURU HQ

Jl. Dr. Saharjo No.161, Manggarai Selatan, Tebet, Kota Jakarta Selatan, Daerah Khusus Ibukota Jakarta 12860

Coba GRATIS Aplikasi Roboguru

Coba GRATIS Aplikasi Ruangguru

Download di Google PlayDownload di AppstoreDownload di App Gallery

Produk Ruangguru

Hubungi Kami

Ruangguru WhatsApp

+62 815-7441-0000

Email info@ruangguru.com

[email protected]

Contact 02140008000

02140008000

Ikuti Kami

©2024 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia