JEE Main 2022 · 24 Jun · Shift 2, Physics question 54

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
$$y=\left(10\cos\pi x\sin\frac{2\pi t}T\right)\text{cm}$$
The amplitude of the particle at $x=\dfrac43$ cm will be ______ cm.