y1 = 2sin(3x – 2t) & y2 = 3sin(3x – 2t + π/4). Find the expression for resultant displacement caused by superposition of the two waves.

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y<sub>1</sub> = 2sin(3x – 2t) & y<sub>2</sub> = 3sin(3x – 2t + π/4). Find the expression for resultant displacement caused by superposition of the two waves.