The equation of a wave is \(y=2\; sin(4x-3t). \) What will be the equation of the reflected wave from a free surface?
\( y=2 \;sin(4x+3t)\)
\( y=2 \;sin(3x-4t)\)
\( y=2\; cos(4x+3t)\)
\( y=2 \;sin(4x-3t)\)
