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Pertanyaan

I. Roy

Master Teacher

Mahasiswa/Alumni Universitas Negeri Surabaya

Jawaban terverifikasi

Jawaban

jawaban yang tepat adalah B

Pembahasan

dengan aturan sinus

$begin mathsize 14px style fraction numerator 4 over denominator sin open parentheses 105 degree close parentheses end fraction equals fraction numerator c over denominator sin space 30 degree end fraction fraction numerator 4 over denominator sin space open parentheses 60 degree plus 45 degree close parentheses end fraction equals fraction numerator c over denominator begin display style bevelled 1 half end style end fraction c open parentheses sin space 60 degree space cos space 45 degree plus cos space 60 degree space sin space 45 degree close parentheses equals 2 c open parentheses 1 half square root of 3 1 half square root of 2 plus 1 half 1 half square root of 2 close parentheses equals 2 c equals fraction numerator 2 over denominator begin display style 1 fourth end style open parentheses square root of 6 plus square root of 2 close parentheses end fraction c equals fraction numerator 8 open parentheses square root of 6 minus square root of 2 close parentheses over denominator 6 minus 2 end fraction c equals 2 open parentheses square root of 6 minus square root of 2 close parentheses end style$

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Jadi, jawaban yang tepat adalah B