$3-22$ The strain components at a point in a body undergoing plane strain are $\_$x$=+720\backslash$mu m $/$ m$,\_$y$=-480\backslash$mu m $/$ m$,$ and $\backslash$gamma $\_$x y$=+360\backslash$mu rad. Determine the strain components $\_$n$,\_$t$,$ and $\backslash$gamma $\_$m when the n t$-$axes are oriented at $\backslash$theta $=30^$ clockwise from the x y$-$axes as shown in Fig. P$3-22.$ Figure P$3-22$