Question: For the element whose stress state is given in Figure 2 , a ) Principal stresses and their directions, b ) Determine the normal stress

For the element whose stress state is given in Figure 2,
a) Principal stresses and their directions,
b) Determine the normal stress and shear stress values that will occur on surface C, which makes an angle of 15\deg with the horizontal, using the Mohr circle. Show it on the figure.
For the element whose stress state is given in

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