An element is subjected to plane stress. By rotating 20 degrees in the clockwise direction from its original position, the element can reach its principal stress state. Which rotation of the element from its original position can reach the state of maximum in-plane shear stress? a) 25 degrees in the counterclockwise direction
b) 70 degrees in the clockwise direction
c) 45 degrees in the clockwise direction
d) 45 degrees in the counterclockwise direction
e) 70 degrees in the counterclockwise direction
f) 25 degrees in the clockwise direction