Describe the partition for each of the following equivalence relations:

(c) for x, y belong to R, xRy iff sinx=siny

(d) For (x,y) and (u,v) belong to RxR (x,y)S(u,v) iff xy=uv=0 or xyuv>0

(e) For x,y belong to R, xTy iff [x]=[y] where [x] is defined to be the greatest integer in x.

Thanks for help on any of them!