if `tan x = - 4/3 , pi/2 lt x lt pi`, then find the values of `sin\ x/2, cos\ x/2 and tan\ x/2`.

if `tan x = - 4/3 , pi/2 lt x lt pi`, then find the values of `sin\ x/2, cos\ x/2 and tan\ x/2`.

if `tan x = - 4/3 , pi/2 lt x lt pi`, then find the values of `sin\ x/2, cos\ x/2 and tan\ x/2`.