Roboguru

Perhatikan setiap gambar di bawah ini, tentukan ni...

Perhatikan setiap gambar di bawah ini, tentukan nilai sinus, cosinus dan tangen setiap sudut yang dinyatakan!space 


   

Jawaban:

Berdasarkan gambar begin mathsize 14px style x equals 10 space dan space y equals negative 12 end style, maka 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row r equals cell square root of x squared plus y squared end root end cell row blank equals cell square root of open parentheses 10 close parentheses squared plus open parentheses negative 12 close parentheses squared end root end cell row blank equals cell square root of 100 plus 144 end root end cell row blank equals cell square root of 244 end cell row blank equals cell 2 square root of 61 end cell end table end style 

Sehingga 

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell cos space open parentheses 360 degree minus alpha close parentheses end cell equals cell x over r end cell row blank equals cell fraction numerator 10 over denominator 2 square root of 61 end fraction end cell row blank equals cell 5 over 61 square root of 61 end cell row cell sin space open parentheses 360 degree minus alpha close parentheses end cell equals cell y over r end cell row blank equals cell negative fraction numerator 12 over denominator 2 square root of 61 end fraction end cell row blank equals cell negative 6 over 61 square root of 61 end cell row cell tan space open parentheses 360 degree minus alpha close parentheses end cell equals cell y over x end cell row blank equals cell fraction numerator negative 12 over denominator 10 end fraction end cell row blank equals cell negative 6 over 5 end cell end table end style 

jadi 
begin mathsize 14px style cos space open parentheses 360 degree minus alpha close parentheses equals 5 over 61 square root of 61 comma space sin space open parentheses 360 degree minus alpha close parentheses equals negative 6 over 61 square root of 61 comma space tan space open parentheses 360 degree minus alpha close parentheses equals negative 5 over 6 end style

 

0

Ruangguru

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

Ikuti Kami

©2021 Ruangguru. All Rights Reserved