When a body is subjected to a direct tensile stress ($$\sigma $$) in one plane, then tangential or shear stress on an oblique section of the body inclined at an angle $$\theta $$ to the normal of the section is

A. $$\sigma \sin 2\theta $$

B. $$\sigma \cos 2\theta $$

C. $$\frac{\sigma }{2}\sin 2\theta $$

D. $$\frac{\sigma }{2}\cos 2\theta $$

Answer: Option C