Jika nilai, maka nilai adalah..

Pertanyaan

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

$fraction numerator 3 square root of 14 over denominator 9 end fraction$
$fraction numerator 2 square root of 14 over denominator 9 end fraction$
$fraction numerator square root of 14 over denominator 9 end fraction$
$fraction numerator 2 square root of 7 over denominator 9 end fraction$
$fraction numerator square root of 7 over denominator 9 end fraction$

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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