Use a graphing utility to graph y1 and y2 in the interval [-2, 2]. Use the graphs

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Use a graphing utility to graph y1 and y2 in the interval [-2π, 2π]. Use the graphs to find real numbers x such that y1 y2.
1. y1 = sin x, y2 = −1/2
2. y1 = cos x, y2 = −1
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