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Cosine Answers

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Find all values of t in the interval [0,2π] that satisfy 2 cos t +1=0 1.) t=π/4, 3π/4, 5π/4 2.) t= π/3, 5π/6, 7π/6 3.) none of these 4.) t= 2π/3, 4π/3 5...

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