The relationship between Shear Stress $(\backslash$sigma $)$ and direct stress $(\backslash$sigma x and $\backslash$sigma y$)$ was found to be of the form;

$=\frac{({}_x-{}_y)}{2}sine(2)$

Find the value of the direct stress $(\backslash$sigma y$)$ when the value of the shear stress $(\backslash$sigma $)$ is $25$ MNm$-2,$ the value

of $(\backslash$sigma x$)$ is $80$ MNm$-2$ and the value of the angle of the plane $(\backslash$theta $)$ to the horizontal is $25\backslash$deg $.$