If cos = 0.2, find the value of: cos + cos( + 2) + cos(

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If cos θ = 0.2, find the value of:

cos θ + cos(θ + 2π) + cos(θ + 4 π)

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Related Book For  answer-question

Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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