Two travelling waves of equal amplitudes and equal frequencies move in opposite directions along a string. They interfere to produce a stationary…

Two travelling waves of equal amplitudes and equal frequencies move in opposite directions along a string. They interfere to produce a stationary wave whose equation is given by $$y=\left(10 \cos \pi x \sin \frac{2 \pi \mathrm{t}}{\mathrm{~T}}\right) \mathrm{cm} $$ The amplitude of the particle at $\displaystyle x=\frac{4}{3} \mathrm{~cm}$ will be \_\_\_\_ cm.