The field existing in rectangular waveguide for TM modes is

Select one:

$H_z=H_{0}cos(\frac{y}{b})cos(t-z)$

a$.$

$E_s=-\frac{b}{}{H}_{0}sin(\frac{y}{b})sin(t-z)$

$E_z=E_{0}sin(\frac{mx}{a})sin(\frac{ny}{b})e^{-z}$