A、[-π,-3π/4]∪[π,5π/4]
B、[-π,-π/2)∪[π,3π/2)
C、[-π,-3π/4]∪[π/4,5π/4]
D、[-π,-π/2)∪[π/4,5π/4]
E、[-π,-π/2)∪[π/4,3π/2)
F、[-π,-3π/4]∪[π/4,π]
G、[-π,-π/2)∪[π,5π/4]
H、[-π,-3π/4]∪[π/4,3π/2)
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