Let y1 (t) = e 2t cos (3t) and y2 (t) = e 2t sin (3t). The Wronskian W( y1, y2 ) (t) equals A. W( y1, y2 ) (t) = 6 e 4t B. W( y1, y2 ) (t) = 4 e 6t C. W( y1, y2 ) (t) = 6t e4t D. W( y1, y2 ) (t) = 4t e6t E. W( y1, y2 ) (t) = 0

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