Comparing \( y = 10 \text{Sin} (1000\pi t - \frac{\pi x}{34}) \) with y = A sin (\omegat - ϕ) where ϕ = \(\frac{2\pi x}{\lambda}\) comparing: \(\frac{2\pi x}{\lambda}\) = \( \frac{\pi x}{34}\) \lambda = 34 \(\times\) 2 = 68 : ϕ = \(\frac{2\pi x}{\lambda}\) = \(\frac{2\pi \times 153}{68}\) ϕ = 4.5\(\pi\) rad = 810^\circ or 90^\circ since sin 810^\circ or 90^\circ = 1