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OpenStudy (anonymous):
Please help !
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OpenStudy (anonymous):
@satellite73 @bahrom7893
OpenStudy (anonymous):
\[\cos(x)=\frac{8}{21}\] \[x=\cos^{-1}(\frac{8}{21})\] and a calculator
OpenStudy (anonymous):
i dont have a calculator it died
OpenStudy (anonymous):
of course you have a calculator. you are on a computer! http://www.wolframalpha.com/input/?i=arccosin%288%2F21%29
OpenStudy (anonymous):
so my answer is 67.6
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OpenStudy (anonymous):
OpenStudy (anonymous):
@satellite73
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