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plot sin(237 * 2pi * t) + sin(238 * 2pi * t) and 2 cos(1/2 * 2pi * t) from t = 0 to t = 1
plot sin(237 * 2pi * t) + sin(238 * 2pi * t) and 2 cos(1/2 * 2pi * t) from t = 0 to t = 1
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