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Pertanyaan

NIlai dari begin mathsize 14px style fraction numerator sin space 70 degree times s e c space 140 degree times tan space 50 degree over denominator cos space 20 degree times s e c space 40 degree space tan space 130 degree end fraction equals... end style 

  1. begin mathsize 14px style negative 1 end style

  2. begin mathsize 14px style 0 end style

  3. begin mathsize 14px style 1 end style

  4. begin mathsize 14px style tan space 20 degree end style 

  5. begin mathsize 14px style s e c space 20 degree end style

M. Nasrullah

Master Teacher

Mahasiswa/Alumni Universitas Negeri Makassar

Jawaban terverifikasi

Pembahasan

begin mathsize 14px style fraction numerator sin space 70 degree times s e c space 140 degree times tan space 50 degree over denominator cos space 20 degree times s e c space 40 degree space tan space 130 degree end fraction equals fraction numerator sin space open parentheses 90 minus 20 close parentheses times s e c space left parenthesis 180 minus 40 right parenthesis times tan space 50 over denominator cos space 20 degree times s e c space 40 degree space tan space left parenthesis 180 minus 50 right parenthesis end fraction equals fraction numerator cos space 20 times open parentheses negative s e c space 40 space close parentheses times tan space 50 over denominator cos space 20 times s e c space 40 space times open parentheses negative tan space 50 close parentheses end fraction equals fraction numerator negative 1 over denominator negative 1 end fraction equals 1 end style 

Jadi, jawaban yang tepat adalah C

 

 

 

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