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Pertanyaan

cos x cos y = ....

cos cos =  ....

  1. begin mathsize 12px style negative 1 half open parentheses cos invisible function application open parentheses x plus y close parentheses plus cos invisible function application open parentheses x minus y close parentheses close parentheses end style 

  2. begin mathsize 12px style negative 1 half open parentheses cos invisible function application open parentheses x plus y close parentheses minus cos invisible function application open parentheses x minus y close parentheses close parentheses end style 

  3. begin mathsize 12px style 1 half open parentheses cos invisible function application open parentheses x minus y close parentheses minus cos invisible function application open parentheses x plus y close parentheses close parentheses end style 

  4. begin mathsize 12px style 1 half open parentheses cos invisible function application open parentheses x plus y close parentheses minus cos invisible function application open parentheses x minus y close parentheses close parentheses end style 

  5. begin mathsize 12px style 1 half open parentheses cos invisible function application open parentheses x plus y close parentheses plus cos invisible function application open parentheses x minus y close parentheses close parentheses end style 

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D. Kamilia

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

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Ingat bahwa Sehingga

Ingat bahwa

begin mathsize 12px style cos invisible function application A cos invisible function application B equals 1 half open parentheses cos invisible function application open parentheses A plus B close parentheses plus cos invisible function application open parentheses A minus B close parentheses close parentheses end style 

Sehingga

begin mathsize 12px style cos invisible function application x cos invisible function application y equals 1 half open parentheses cos invisible function application open parentheses x plus y close parentheses plus cos invisible function application open parentheses x minus y close parentheses close parentheses end style 

 

 

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