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25-03-2016
Mathematics

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Find the cos(19pi/6)

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Аноним Аноним

25-03-2016

π=180º

Cos(19π/6)=cos(19*180º/6)=cos (570º)=cos(210º+360º)=cos(210º)=
=-cos 30º=-√3 / 2≈-0.866...

Answer: cos(19π/6)=-cos 30º=-√3/2

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