|3tan30°-1|-4（sin²60°-1）+∫2×cos45°
问题描述：
|3tan30°-1|-4（sin²60°-1）+∫2×cos45°
答
|3tan30°-1|-4（sin²60°-1）+∫2×cos45°
=|√ 3-1|-4（3/4 -1）+∫2×√ 2 /2
=√ 3 -1-3 +4+1
=√ 3 +1