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Pertanyaan

cos 67,5° cos 22,5° = ....

cos67,5° cos22,5° =  ....

  1. begin mathsize 12px style 1 fourth square root of 2 end style 

  2. begin mathsize 12px style 1 half plus 1 fourth square root of 2 end style 

  3. begin mathsize 12px style square root of 2 end style 

  4. begin mathsize 12px style negative 1 half minus 1 fourth square root of 2 end style 

  5. begin mathsize 12px style negative 1 fourth square root of 2 end style 

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D. Kamilia

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

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begin mathsize 12px style table attributes columnalign right center left columnspacing 0px end attributes row cell cos invisible function application 67 , 5 degree cos invisible function application 22 , 5 degree end cell equals cell 1 half open parentheses cos invisible function application open parentheses 67 , 5 degree plus 22 , 5 degree close parentheses plus cos invisible function application open parentheses 67 , 5 degree minus 22 , 5 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 45 degree close parentheses end cell row blank equals cell 1 half open parentheses 0 plus 1 half square root of 2 close parentheses end cell row blank equals cell 1 fourth square root of 2 end cell row blank blank blank row blank blank blank end table end style 

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tan 67,5° tan 22,5° = ...

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