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Jika nilai, maka nilai adalah..

Pertanyaan

Jika nilaispace sin alpha equals 5 over 9, maka nilai cos alpha adalah..

  1. fraction numerator 3 square root of 14 over denominator 9 end fraction

  2. fraction numerator 2 square root of 14 over denominator 9 end fraction

  3. fraction numerator square root of 14 over denominator 9 end fraction

  4. fraction numerator 2 square root of 7 over denominator 9 end fraction

  5. fraction numerator square root of 7 over denominator 9 end fraction

Pembahasan Soal:

sinα equals 5 over 9

BC equals square root of AC squared minus AB squared end root  equals square root of 9 squared minus 5 squared end root  equals square root of 81 minus 25 end root  equals square root of 56 space equals space square root of 4 straight x 14 end root space equals space 2 square root of 14  cosα equals BC over AC equals fraction numerator 2 square root of 14 over denominator 9 end fraction

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 22 Desember 2020

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