What are the zeros of f(x) = 2 cos (3x) + 1 on the interval [0, ]?

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What are the zeros of f(x) = 2 cos (3x) + 1 on the interval [0, π]?

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Related Book For  answer-question

Precalculus

ISBN: 978-0321716835

9th edition

Authors: Michael Sullivan

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