The state of stress at a point in a rockmass is shown in the figure below.
(a) Use the stress transformation method to determine the normal and shear stresses acting on the inclined joint and show clearly their direction of action on the joint plane.
(b) Use the Mohr’s circle to verify your results from (a).
(c) Use the Mohr's circle method to determine the principal stresses and direction of the major principal stress relative to x-axis.