Equation Icon  if if if x1 + ix2 = sing cosy e 1, x3 + ix4 = sing siny e 2, x5 +ix6 = cosg e 3; y1 + iy2 = sinhr cosyeif1, y3 + iy4 = sinh r siny eif2, y-1 + iy0 = coshr eit.