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10 degree plus 30 degree plus 50 degree plus 70 degree plus space... space plus 170 degree equals ...

  1. 6 1 half straight pi  

  2. 5 1 half straight pi  

  3. 4 1 half straight pi  

  4. 3 1 half straight pi  

  5. 2 1 half straight pi  

Jawaban:

Diketahui:

a equals 10 degree b equals 30 degree minus 10 degree equals 20 degree n equals 9  

Jumlah dari 10 degree plus 30 degree plus 50 degree plus 70 degree plus space... space plus 170 degree:

table attributes columnalign right center left columnspacing 0px end attributes row cell S subscript n end cell equals cell n over 2 open parentheses 2 a plus open parentheses n minus 1 close parentheses b close parentheses end cell row cell S subscript 9 end cell equals cell 9 over 2 open parentheses 2 open parentheses 10 degree close parentheses plus open parentheses 9 minus 1 close parentheses open parentheses 20 degree close parentheses close parentheses end cell row blank equals cell 9 over 2 open parentheses 20 degree plus 160 degree close parentheses end cell row blank equals cell 9 over 2 open parentheses 180 degree close parentheses end cell row blank equals cell 810 degree end cell end table  

Nilai dari 810 degree dalam radian:

table attributes columnalign right center left columnspacing 0px end attributes row cell 810 degree cross times fraction numerator straight pi over denominator 180 degree end fraction end cell equals cell 81 over 18 straight pi end cell row blank equals cell 9 over 2 straight pi end cell row blank equals cell 4 1 half straight pi end cell end table

Sehingga, hasil dari 10 degree plus 30 degree plus 50 degree plus 70 degree plus space... space plus 170 degree dalam radian adalah 4 1 half straight pi.

Jadi, jawaban yang tepat adalah C.

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