at a point in a loaded member, the stresses relative to an x, y, z coordinate system are given by calculate the magnitude and direction of maximum principal stress.
a) Magnitude = 150 MPa, Direction = Inclined at 30 degrees to the x-axis
b) Magnitude = 120 MPa, Direction = Inclined at 45 degrees to the y-axis
c) Magnitude = 200 MPa, Direction = Inclined at 60 degrees to the z-axis
d) Magnitude = 180 MPa, Direction = Inclined at 90 degrees to the x-axis