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Nilai dari  adalah ....

Nilai dari begin mathsize 14px style sin space 330 degree plus 2 times cos space 240 degree minus sin space 210 degree end style adalah ....

Jawaban:

Dengan menggunakan sudut berelasi.

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row blank blank cell sin space 330 degree plus 2 times cos space 240 degree minus sin space 210 degree end cell row blank equals cell sin space open parentheses 360 degree minus 30 degree close parentheses plus 2 times cos space open parentheses 180 degree plus 60 degree close parentheses end cell row blank blank cell negative sin space open parentheses 180 degree plus 30 degree close parentheses end cell row blank equals cell negative sin space 30 degree plus 2 times open parentheses negative cos space 60 degree close parentheses minus open parentheses negative sin space 30 degree close parentheses end cell row blank equals cell negative 1 half plus 2 times open parentheses negative 1 half close parentheses plus 1 half end cell row blank equals cell negative 1 half plus open parentheses negative 1 close parentheses plus 1 half end cell row blank equals cell fraction numerator negative 1 minus 2 plus 1 over denominator 2 end fraction end cell row blank equals cell fraction numerator negative 2 over denominator 2 end fraction end cell row blank equals cell negative 1 end cell end table end style   

Jadi, nilai dari begin mathsize 14px style sin space 330 degree plus 2 times cos space 240 degree minus sin space 210 degree end style adalah begin mathsize 14px style negative 1 end style.

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