solve an equation on an interval

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771

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solve the equation on the interval [0,2pi)

2 cos 2x -1=0
What is the solution set answered in terms of pi

EdDad28 Nov 20, 2012

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1⁺⁰ Answers

+1223

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2 cos 2x= 1

cos 2x = 1/2

2x = pi/3, 2pi/3

x = pi/6, pi/3

CubeyThePenguin Feb 21, 2021

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