Please solve the following

The positions of two particles on the s-axis are $1 = sin t and s2 = sint + with s1 and s2 in meters and t in seconds. At what time(s) in the interval 0 s t s 2n do the particles meet? At = -it sec and t = N/W -n sec B) t = n sec and t = 2n sec N 11 C) t = 11 it sec and t = -n sec 4 D) t = -n sec and t = 4 n sec 8 8