计算:根号(tan²60°-4tan60°+4 )+ ( 2倍根号2cos45°)/(tan60°- tan45°)题目有点儿..一定要算准啊,最好快些
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计算:根号(tan²60°-4tan60°+4 )+ ( 2倍根号2cos45°)/(tan60°- tan45°)题目有点儿..一定要算准啊,最好快些
计算:根号(tan²60°-4tan60°+4 )+ ( 2倍根号2cos45°)/(tan60°- tan45°)
题目有点儿..
一定要算准啊,
最好快些
计算:根号(tan²60°-4tan60°+4 )+ ( 2倍根号2cos45°)/(tan60°- tan45°)题目有点儿..一定要算准啊,最好快些
根号(tan²60°-4tan60°+4 )+ ( 2倍根号2cos45°)/(tan60°- tan45°)
=√(tan60°-2)²+2√2×√2/2/(√3-1)
=2-√3+2/(√3-1)
=2-√3+√3+1
=3