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The active earth pressure of a soil is proportional to (where φ is the angle of friction of the soil). | |
A. | tan (45° - Ï) [Wrong Answer] |
B. | tan2 (45° + Ï/2) [Wrong Answer] |
C. | tan2 (45° - Ï/2) [Correct Answer] |
D. | tan (45° + Ï) [Wrong Answer] |