A beam of channel section is subjected to a bending moment M having its vector at an

Question:

A beam of channel section is subjected to a bending moment M having its vector at an angle u to the z axis (see figure).
Determine the orientation of the neutral axis and calculate the maximum tensile stress σt and maximum compressive stress sc in the beam. Use a C 200 x 20.5 channel section with M = 0.75 kN ∙ m and θ = 20°.