Roboguru

Pertanyaan

Himpunan penyelesaian persamaan cos 2 x minus 3 cos x plus 2 equals 0 untuk 0 less or equal than x less or equal than 2 straight pi adalah ...

  1. open curly brackets 0 comma space straight pi over 2 comma space 3 over 4 straight pi comma space 2 straight pi close curly brackets

  2. open curly brackets 0 comma space straight pi over 3 comma space 5 over 3 straight pi comma space 2 straight pi close curly brackets

  3. open curly brackets 0 comma space straight pi over 3 comma space 2 over 3 straight pi comma space 2 straight pi close curly brackets

  4. open curly brackets 0 comma space straight pi over 2 comma straight pi comma space 3 over 2 straight pi close curly brackets

  5. open curly brackets 0 comma space straight pi over 2 comma space straight pi comma space 2 straight pi close curly brackets

H. Nufus

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

Pembahasan

cos space 2 straight x minus 3 space cosx plus 2 equals 0  2 space cos squared space straight x space minus space 1 minus space 3 space cos space straight x space plus space 2 space equals space 0  2 space cos squared space straight x space minus space 3 space cos space straight x space plus space 1 space equals space 0  left parenthesis 2 space cosx minus 1 right parenthesis left parenthesis cosx minus 1 right parenthesis equals 0  2 space cosx minus 1 equals 0 space  2 space cosx equals 1  cosx equals 1 half    asterisk times 2 space cosx minus 1 equals 0  2 space cosx equals 1  cosx equals 1 half  straight x equals open curly brackets straight pi over 3 comma 5 over 3 straight pi close curly brackets    asterisk times cosx space minus space 1 space equals space 0 space  cosx space equals 1  straight x equals open curly brackets 0 comma 2 straight pi close curly brackets  HP equals open curly brackets 0 comma space straight pi over 3 comma 5 over 3 straight pi comma space 2 straight pi close curly brackets

182

5.0 (1 rating)

Pertanyaan serupa

Selesaikan persamaan: 3x3−4x2−5x+2=0, lalu tentukan semua nilai θ pada 0∘≤θ≤360∘ yang memenuhi persamaan trigonometri: 3cos3θ−5cosθ+2=4cos2θ

26

0.0

Jawaban terverifikasi

RUANGGURU HQ

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

Coba GRATIS Aplikasi Ruangguru

Produk Ruangguru

Produk Lainnya

Hubungi Kami

Ruangguru WhatsApp

081578200000

Email info@ruangguru.com

info@ruangguru.com

Contact 02140008000

02140008000

Ikuti Kami

©2022 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia