Answer :
Given:
[tex]\theta=135^{\circ}[/tex]To convert the degrees to radians:
As we know,
[tex]\text{Radian}=\theta\times\frac{\pi}{180}[/tex]So, we get
[tex]\begin{gathered} \text{Radian}=135\times\frac{\pi}{180} \\ =\frac{27\pi}{36} \\ =\frac{3\pi}{4} \end{gathered}[/tex]Hence the answer is,
[tex]\frac{3\pi}{4}\text{ (or) 0.75}\pi[/tex]