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10-08-2016
Mathematics

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Hello help me please
Cos 3pi/6 + 7pi/6

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BMdNasim BMdNasim

10-08-2016

if you mean cos 3π/6 + 7π/6
then it is cos π/2 + 7π/6
=0+7π/6
=7π/6
And if you mean cos(3π/6 + 7π/6)
=cos(10π/6)
=cos(12π-2π/6)
=cos(2π-π/3)
=cos π/3
=0.5

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