Pertanyaan

Nilai cos ( 21 0 ∘ ) − cos ( 30 0 ∘ ) sin ( 15 0 ∘ ) + sin ( 12 0 ∘ ) = …

Nilai $\frac{sin ( 15 0 ^{\circ} ) + sin ( 12 0 ^{\circ} )}{cos ( 21 0 ^{\circ} ) - cos ( 30 0 ^{\circ} )} = \dots$

P. Tessalonika

Master Teacher

Mahasiswa/Alumni Universitas Negeri Medan

Jawaban terverifikasi

Pembahasan

Jawaban yang benar adalah . Tidak ada pilihan jawaban yang benar.

$table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator sin open parentheses 150 degree close parentheses plus sin open parentheses 120 degree close parentheses over denominator cos open parentheses 210 degree close parentheses minus cos open parentheses 300 degree close parentheses end fraction end cell equals cell fraction numerator sin open parentheses 180 degree minus 30 degree close parentheses plus sin open parentheses 180 degree minus 60 degree close parentheses over denominator cos open parentheses 180 degree plus 30 degree close parentheses minus cos open parentheses 360 degree minus 60 degree close parentheses end fraction end cell row blank equals cell fraction numerator sin open parentheses 30 degree close parentheses plus sin open parentheses 60 degree close parentheses over denominator negative cos open parentheses 30 degree close parentheses minus cos open parentheses 60 degree close parentheses end fraction end cell row blank equals cell fraction numerator begin display style 1 half end style plus begin display style 1 half end style square root of 3 over denominator negative begin display style 1 half end style square root of 3 minus begin display style 1 half end style end fraction end cell row blank equals cell fraction numerator open parentheses begin display style 1 half end style square root of 3 plus begin display style 1 half end style close parentheses over denominator negative open parentheses begin display style 1 half end style square root of 3 plus begin display style 1 half end style close parentheses end fraction end cell row blank equals cell fraction numerator 1 over denominator negative 1 end fraction end cell row blank equals cell negative 1 end cell end table$

Jawaban yang benar adalah negative 1 .

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