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<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Perhatikan setiap gambar di bawah ini, tentukan nilai sinus, cosinus dan tangen setiap sudut yang dinyatakan!

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 negative 4 space dan space y equals negative 3 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 negative 4 close parentheses squared plus open parentheses negative 3 close parentheses squared end root end cell row blank equals cell square root of 16 plus 9 end root end cell row blank equals cell square root of 25 end cell row blank equals 5 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 180 degree plus alpha close parentheses end cell equals cell x over r end cell row blank equals cell negative 4 over 5 end cell row cell sin space open parentheses 180 degree plus alpha close parentheses end cell equals cell y over r end cell row blank equals cell negative 3 over 5 end cell row cell tan space open parentheses 180 degree plus alpha close parentheses end cell equals cell y over x end cell row blank equals cell fraction numerator negative 3 over denominator negative 4 end fraction end cell row blank equals cell 3 over 4 end cell end table end style 

Jadi 
begin mathsize 14px style cos space open parentheses 180 degree plus alpha close parentheses equals negative 4 over 5 comma space sin space open parentheses 180 degree plus alpha close parentheses equals negative 3 over 5 comma space tan space open parentheses 180 degree plus alpha close parentheses equals 3 over 4 end style

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