根号(sin60°-tan45°)²·(cos30°+2sin²45°)
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根号(sin60°-tan45°)²·(cos30°+2sin²45°)根号(sin60°-tan45°)²·(cos30°+2sin²45°)根号(sin60
根号(sin60°-tan45°)²·(cos30°+2sin²45°)
根号(sin60°-tan45°)²·(cos30°+2sin²45°)
根号(sin60°-tan45°)²·(cos30°+2sin²45°)
√（sin60°-tan45°）^2*(cos30°+2(sin45°)^2
=√(√3/2-1)^2*(√3/2+2*1/2)
=|√3/2-1|*(√3/2+1)
=(1-√3/2)*(1+√3/2)
=1-(√3/2)^2
=1-3/4
=1/4