Pertanyaan

sin x + sin y = ...

$begin mathsize 14px style cos invisible function application open parentheses fraction numerator straight x plus straight y over denominator 2 end fraction close parentheses space sin invisible function application open parentheses fraction numerator straight x minus straight y over denominator 2 end fraction close parentheses end style$
$begin mathsize 14px style 2 cos invisible function application open parentheses fraction numerator straight x plus straight y over denominator 2 end fraction close parentheses space sin invisible function application open parentheses fraction numerator straight x minus straight y over denominator 2 end fraction close parentheses end style$
$begin mathsize 14px style 2 sin invisible function application open parentheses fraction numerator straight x plus straight y over denominator 2 end fraction close parentheses space sin invisible function application open parentheses fraction numerator straight x minus straight y over denominator 2 end fraction close parentheses end style$
$begin mathsize 14px style 2 sin invisible function application open parentheses fraction numerator straight x plus straight y over denominator 2 end fraction close parentheses cos invisible function application open parentheses fraction numerator straight x minus straight y over denominator 2 end fraction close parentheses end style$
$begin mathsize 14px style sin invisible function application open parentheses fraction numerator straight x plus straight y over denominator 2 end fraction close parentheses cos invisible function application open parentheses fraction numerator straight x minus straight y over denominator 2 end fraction close parentheses end style$

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Klaim

D. Kamilia

Master Teacher

Mahasiswa/Alumni Universitas Negeri Malang

Jawaban terverifikasi

Pembahasan

Ingat : Sehingga

Ingat :

$begin mathsize 14px style sin invisible function application straight alpha plus sin invisible function application straight beta equals 2 space sin invisible function application open parentheses fraction numerator straight alpha plus straight beta over denominator 2 end fraction close parentheses cos invisible function application open parentheses fraction numerator straight alpha minus straight beta over denominator 2 end fraction close parentheses end style$

Sehingga

$begin mathsize 14px style sin invisible function application straight x plus sin invisible function application straight y equals 2 space sin invisible function application open parentheses fraction numerator straight x plus straight y over denominator 2 end fraction close parentheses cos invisible function application open parentheses fraction numerator straight x minus straight y over denominator 2 end fraction close parentheses end style$