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someone help please!! CONCEPT CHECK #2 Calculator Allowed 1. Given 2 cos2x +5 cos x = -2, a. Find all the solutions in exact b.

someone help please!!

CONCEPT CHECK #2 Calculator Allowed 1. Given 2 cos2x +5 cos x = -2, a. Find all the solutions in exact b. Sketch the graph within the in form in the interval [-21t, 2nt] interval [-21t, 2x] to verify your answers in part (a)

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