The relation between the stress component in x-direction on a horizontal plane in Cartesian coordinates and polar coordinates for vertical line load is ___________

• A. σₓ=σᵣ tan²⁡θ
• B. σₓ=σᵣ cosec²⁡θ
• C. σₓ=σᵣ cos⁡θ
• D. σₓ=σᵣ sin²⁡θ