If the Brewster's angle for the light propagation from air to glass is ' $\theta$ ', then Brewster's angle for the light propagating from glass to air is $\left(\frac{\pi}{2}-\theta\right)$.

The Brewster's angle for the light propagating from the glass to air is $\tan ^{-1}(\mu)$ where $\mu$ is the refractive index of glass.

The Brewster's angle for light propagating from air to glass is ' $\theta$ ' then Brewster's angle for the light propagating from glass to air is $(\pi+\theta)$.

The Brewster's angle for light propagating from glass to air is $\tan (\mu)$ where is $\mu$ the refractive index of glass.