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begin mathsize 14px style cos invisible function application 10 degree open parentheses cos invisible function application 80 degree minus cos invisible function application 60 degree plus cos invisible function application 40 degree close parentheses equals end style....

  1. begin mathsize 14px style 1 half plus 1 fourth square root of 3 end style   

  2. undefined   

  3. begin mathsize 14px style 1 fourth square root of 2 end style    

  4. begin mathsize 14px style 1 fourth end style    

  5. begin mathsize 14px style 3 over 4 end style    

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M. Robo

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Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah B.

jawaban yang tepat adalah B.

Pembahasan

Ingat bahwa Soal di atas dapat ditulis menjadi, Perhatikan bahwa Dengan demikian, Jadi, jawaban yang tepat adalah B.

Ingat bahwa

begin mathsize 14px style cos invisible function application alpha cos invisible function application beta equals cos invisible function application open parentheses alpha plus beta close parentheses plus cos invisible function application open parentheses alpha minus beta close parentheses end style  

Soal di atas dapat ditulis menjadi,

begin mathsize 14px style cos invisible function application 10 degree open parentheses cos invisible function application 80 degree minus cos invisible function application 60 degree plus cos invisible function application 40 degree close parentheses equals cos invisible function application 10 degree cos invisible function application 80 degree minus cos invisible function application 10 degree cos invisible function application 60 degree plus cos invisible function application 10 degree cos invisible function application 40 degree equals cos invisible function application 80 degree cos invisible function application 10 degree minus cos invisible function application 60 degree cos invisible function application 10 degree plus cos invisible function application 40 degree cos invisible function application 10 degree end style  

Perhatikan bahwa

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell cos invisible function application 80 degree cos invisible function application 10 degree end cell equals cell 1 half open parentheses cos invisible function application open parentheses 80 degree plus 10 degree close parentheses plus cos invisible function application open parentheses 80 degree minus 10 degree close parentheses close parentheses end cell row blank equals cell 1 half open parentheses cos invisible function application 90 degree plus cos invisible function application 70 degree close parentheses end cell row blank blank blank row cell cos invisible function application 60 degree cos invisible function application 10 degree end cell equals cell 1 half open parentheses cos invisible function application open parentheses 60 degree plus 10 degree close parentheses plus cos invisible function application open parentheses 60 degree minus 10 degree close parentheses close parentheses end cell row blank equals cell 1 half open parentheses cos invisible function application 70 degree plus cos invisible function application 50 degree close parentheses end cell row blank blank blank row cell cos invisible function application 40 degree cos invisible function application 10 degree end cell equals cell 1 half open parentheses cos invisible function application open parentheses 40 degree plus 10 degree close parentheses plus cos invisible function application open parentheses 40 degree minus 10 degree close parentheses close parentheses end cell row blank equals cell 1 half open parentheses cos invisible function application 50 degree plus cos invisible function application 30 degree close parentheses end cell end table end style      

Dengan demikian,

begin mathsize 12px style cos invisible function application 80 degree cos invisible function application 10 degree minus cos invisible function application 60 degree cos invisible function application 10 degree plus cos invisible function application 40 degree cos invisible function application 10 degree equals 1 half left parenthesis cos invisible function application 90 degree plus cos invisible function application 70 degree right parenthesis minus 1 half left parenthesis cos invisible function application 70 degree plus cos invisible function application 50 degree right parenthesis plus 1 half left parenthesis cos invisible function application 50 degree plus cos invisible function application 30 degree right parenthesis equals 1 half open parentheses cos invisible function application 90 degree plus cos invisible function application 70 degree minus cos invisible function application 70 degree minus cos invisible function application 50 degree plus cos invisible function application 50 degree plus cos invisible function application 30 degree close parentheses equals 1 half left parenthesis cos invisible function application 90 degree plus cos invisible function application 30 degree right parenthesis equals 1 half open parentheses 0 plus 1 half square root of 3 close parentheses equals 1 fourth square root of 3 end style        

Jadi, jawaban yang tepat adalah B.

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