SOLUTION: if cos(θ)= 0.6, what is the exact value of cos(θ)+cos(θ+2π)+cos(θ+4π)?

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Question 991408: if cos(θ)= 0.6, what is the exact value of cos(θ)+cos(θ+2π)+cos(θ+4π)?

Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
They all = 0.6