(1)原式=2× 1 2 +3× 3 3 +1=2+ 3 ;(2)原式= 2 2 + 3 × 3 2 = 2 ...
计算:(1)2sin30°+3tan30°+cot45°;(2)sin45°+tan60°cos30°;(3) 3cot
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