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Diketahui , maka nilai adalah...

Diketahui begin mathsize 14px style cos space straight A equals 0 comma 8 end style, maka nilai begin mathsize 14px style sin space straight A end style adalah...

Jawaban:

Berdasarkan rumus begin mathsize 14px style cos squared space alpha plus sin squared space alpha equals 1 end style, maka:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell sin squared space alpha end cell equals cell 1 minus cos squared space alpha end cell row cell sin space alpha end cell equals cell square root of 1 minus cos squared space alpha end root end cell end table end style 

Dengan demikian:

begin mathsize 14px style table attributes columnalign right center left columnspacing 0px end attributes row cell sin space straight A end cell equals cell square root of 1 minus cos squared space straight A end root end cell row cell sin space straight A end cell equals cell square root of 1 minus open parentheses 0 comma 8 close parentheses squared end root end cell row cell sin space straight A end cell equals cell square root of 1 minus 0 comma 64 end root end cell row cell sin space straight A end cell equals cell square root of 0 comma 36 end root end cell row cell sin space straight A end cell equals cell plus-or-minus 0 comma 6 end cell end table end style 

Sehingga, nilai begin mathsize 14px style sin space straight A equals plus-or-minus 0 comma 6 end style.

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