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先化简，再求值：（﹣）÷，其中a＝2sin60°﹣tan45°．
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先化简再求值﹣÷其中a＝2sin60°﹣tan45°．
先化简再求值其中x＝6sin60°-2tan45°．
先化简再求值b2﹣÷a﹣其中a=tan45°b=2sin60°.
先化简再求值﹣1÷其中x=2sin60°+1.
先化简再求值+1÷其中a=tan60°﹣|﹣1|.
先化简再求值其中a=2tan60°b=2cos30°
先化简再求值﹣÷其中x=2sin60°+2tan45°．
先化简再求值÷﹣1.其中a=2sin60°﹣tan45°b=1.
先化简再求值÷﹣1.其中a=2sin60°﹣tan45°b=1.
先化简再求值÷﹣1.其中a=2sin60°﹣tan45°b=1.
先化简再求值a+3a﹣2﹣aa﹣1其中a＝2sin60°+3．
分式化简求值1-÷其中a=2sin60°-tan45°b=1．
先化简再求值其中a=2sin60°-tan45°.
先化简再求值.其中a=tan60°
先化简再求值其中a＝sin60°b＝tan60°.
先化简再求值÷﹣1.其中a=2sin60°﹣tan45°b=1.
先化简再求的值其中a=2sin60°-2tan30°．
先化简再求值其中x＝tan60°－1.改编
先化简再求值其中a=2sin60°+3tan45°．
先化简再求值÷其中a=2sin60°﹣2tan45°．
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