A. nπ +π/3: n ε Z
B. nπ + tan-1(1/2): n ε Z or nπ+π/4: n ε Z
C. nπ + (-1)nπ/6: n ε Z
D. nπ + tan-1(3/2): n εZ or nπ+ tan-1(1/4): n ε Z
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