The active earth pressure of a soil is proportional to (where is the angle of friction of the soil)
(A) tan (45° - )
(B) tan2
(45° + /2)
(C) tan2
(45° - /2)
(D) tan (45° + )
(A) tan (45° - )
(B) tan2
(45° + /2)
(C) tan2
(45° - /2)
(D) tan (45° + )