
${y}=1.0\, {mm} \cos \left(1.57 \,{cm}^{-1}\right) {x} \sin \left(78.5\, {s}^{-1}\right) {t}$
The node closest to the origin in the region ${x}>0$ will be at ${x}=\ldots \ldots \ldots\, {cm}$
$y = 10^{-4}\, sin\, (60\,t + 2x)$
Where $x$ and $y$ are in $metres$ and $t$ is in $ec$ . Which of the following statements is correct ?