superposition of the two waves?"

Show answer choices

$($A$)-3\mathrm{.}2$cmcos$(1502(ra\frac{d}{s})t)sin(10\mathrm{.}2(m^{-1})x)$

$3\mathrm{.}2$cmcos$(1502(ra\frac{d}{s})t)cos(-10\mathrm{.}2(m^{-1})x)$

$3\mathrm{.}2$cmsin$(1502(ra\frac{d}{s})t-10\mathrm{.}2(m^{-1})x)$

$-3\mathrm{.}2$cmsin$(1502(ra\frac{d}{s})t)sin(10\mathrm{.}2(m^{-1})x)$

$3\mathrm{.}2$cmsin$(1502(ra\frac{d}{s})t)cos(10\mathrm{.}2(m^{-1})x)$