The effective stress friction angle of a saturated, cohesionless soil is $38^{\circ} .$ The ratio of shear stress to normal effective stress on the failure plane is
(A) 0.781
(B) 0.616
(C) 0.488
(D) 0.438
The effective stress friction angle of a saturated, cohesionless soil is $38^{\circ} .$ The ratio of shear stress to normal effective stress on the failure plane is
(A) 0.781
(B) 0.616
(C) 0.488
(D) 0.438