Pertanyaan

cos x − cos y sin ( x + y ) sin ( x − y ) = ....

$\frac{sin ( x + y ) sin ( x - y )}{cos x - cos y} =$ ....

cos x + cos y
cos x - cos y
- cos x + cos y
-cos x - cos y
0

M. Robo

Master Teacher

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah D.

Pembahasan

Perhatikan bahwa Ingat bahwa Sehingga Maka Jadi, jawaban yang tepat adalah D.

Perhatikan bahwa

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Ingat bahwa

Sehingga

Maka

$begin mathsize 12px style table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator sin invisible function application open parentheses x plus y close parentheses sin invisible function application open parentheses x minus y close parentheses over denominator cos invisible function application x minus cos invisible function application y end fraction end cell equals cell fraction numerator cos squared invisible function application y minus cos squared invisible function application x over denominator cos invisible function application x minus cos invisible function application y end fraction end cell row blank equals cell fraction numerator open parentheses cos invisible function application y plus cos invisible function application x close parentheses open parentheses cos invisible function application y minus cos invisible function application x close parentheses over denominator negative open parentheses cos invisible function application y minus cos invisible function application x close parentheses end fraction end cell row blank equals cell negative open parentheses cos invisible function application y plus cos invisible function application x close parentheses end cell row blank equals cell negative cos invisible function application y minus cos invisible function application x end cell row blank equals cell negative cos invisible function application x minus cos invisible function application y end cell end table end style$

Jadi, jawaban yang tepat adalah D.