Roboguru

Perhatikan gambar berikut! Besar

Pertanyaan

Perhatikan gambar berikut!

Besar angle BAC equals space.... 

  1. 30 degree 

  2. 45 degree 

  3. 60 degree 

  4. 90 degree 

  5. 105 degree 

Pembahasan Soal:

Dengan konsep aturan sinus dipeoroleh :

table attributes columnalign right center left columnspacing 0px end attributes row cell fraction numerator Sin space angle ABC over denominator AC end fraction end cell equals cell fraction numerator sin space angle BAC over denominator BC end fraction end cell row cell fraction numerator Sin space 120 degree over denominator 9 space cm end fraction end cell equals cell fraction numerator sin space angle BAC over denominator 3 square root of 6 space cm end fraction end cell row cell fraction numerator begin display style 1 half end style square root of 3 over denominator 9 space cm end fraction end cell equals cell fraction numerator sin space angle BAC over denominator 3 square root of 6 space cm end fraction end cell row cell sin space angle BAC end cell equals cell fraction numerator 1 half square root of 3 times 3 square root of 6 space cm over denominator 9 space cm end fraction end cell row blank equals cell fraction numerator begin display style 3 over 2 end style square root of 18 over denominator 9 end fraction end cell row blank equals cell fraction numerator begin display style 3 over 2 end style square root of 9 cross times 2 end root over denominator 9 end fraction end cell row blank equals cell fraction numerator begin display style 3 over 2 times 3 square root of 2 end style over denominator 9 end fraction end cell row blank equals cell fraction numerator begin display style 9 over 2 square root of 2 end style over denominator 9 end fraction end cell row blank equals cell 1 half square root of 2 end cell end table 

Karena table attributes columnalign right center left columnspacing 0px end attributes row blank blank angle end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank BAC end table ada di kuadran I maka table attributes columnalign right center left columnspacing 0px end attributes row blank blank angle end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank BAC end table table attributes columnalign right center left columnspacing 0px end attributes row blank equals blank end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank 45 end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank degree end table table attributes columnalign right center left columnspacing 0px end attributes row blank blank. end table 

Oleh karena itu, Jawaban yang benar adalah B

Pembahasan terverifikasi oleh Roboguru

Terakhir diupdate 05 Mei 2021

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