Resolviendo ecuaciones trigonométricas usando identidades pitagóricas

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Usando las identidades Pitagóricas, resuelve:

$2\cos^2x + 3sen \, x - 3 = 0$ $2 cos^{2} x + 3 se n x - 3 = 0$
$0 \leq x$ $0 \leq x$ < $2\pi$ $2 π$

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