Iklan

Pertanyaan

12. Sederhanakanlah. a. sin 4 2 ∘ + sin 1 8 ∘

12. Sederhanakanlah.

a.  

Ikuti Tryout SNBT & Menangkan E-Wallet 100rb

Habis dalam

00

:

08

:

45

:

32

Klaim

Iklan

P. Tessalonika

Master Teacher

Mahasiswa/Alumni Universitas Negeri Medan

Jawaban terverifikasi

Jawaban

.

 table attributes columnalign right center left columnspacing 0px end attributes row blank blank sin end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 42 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank degree end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank sin end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 18 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank degree end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cos end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 12 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank degree end table.

Pembahasan

Ingat rumus identitas penjumlahan sinusberikut: Dari soal diketahui: x = y = Sehingga persamaan trigonometri tersebut menjadi: Dengan demikian, .

Ingat rumus identitas penjumlahan sinus berikut:

sin space x plus sin space y equals 2 space sin space 1 half open parentheses x plus y close parentheses space cos space 1 half open parentheses x minus y close parentheses 

Dari soal diketahui:

x42 degree 

y = 18 degree 

Sehingga persamaan trigonometri tersebut menjadi:

table attributes columnalign right center left columnspacing 0px end attributes row cell sin space 42 degree plus sin space 18 degree end cell equals cell 2 space sin space 1 half open parentheses x plus y close parentheses space cos space 1 half open parentheses x minus y close parentheses end cell row blank equals cell 2 space sin space 1 half open parentheses 42 degree plus 18 degree close parentheses space cos space 1 half open parentheses 42 degree minus 18 degree close parentheses end cell row blank equals cell 2 space sin space 1 half open parentheses 60 degree close parentheses space cos space 1 half open parentheses 24 degree close parentheses end cell row blank equals cell 2 space sin space 30 degree space cos space 12 degree end cell row blank equals cell 2 open parentheses 1 half close parentheses open parentheses cos space 12 degree close parentheses end cell row blank equals cell cos space 12 degree end cell end table 

Dengan demikian, table attributes columnalign right center left columnspacing 0px end attributes row blank blank sin end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 42 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank degree end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank plus end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank sin end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 18 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank degree end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank cos end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank space end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 12 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank degree end table.

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

2

FARRAS ZAHIRA

Jawaban tidak sesuai

Iklan

Pertanyaan serupa

cos θ − cos 3 θ sin θ + sin 3 θ ​ sama dengan....

1

3.0

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 02130930000

02130930000

Ikuti Kami

©2025 Ruangguru. All Rights Reserved PT. Ruang Raya Indonesia