sin60°-1除以sin60°+1(sin60°-1)除以(sin60°+1)多少?

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sin60°-1除以sin60°+1(sin60°-1)除以(sin60°+1)多少?
sin60°-1除以sin60°+1
(sin60°-1)除以(sin60°+1)
多少?

sin60°-1除以sin60°+1(sin60°-1)除以(sin60°+1)多少?
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