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58问答库 > 求详细的计算过程，能看懂为宜？

求详细的计算过程，能看懂为宜？

2025-03-31 16:14:50

推荐回答（4个）

回答（1）：

解答

回答（2）：

都详细的计算过程，能否看懂唯一我看不懂

回答（3）：

嗯嗯。对的就是这样的哈哈哈

回答（4）：

拆成两个积分，一个是sin²t=(1-cos2x)/2, 一个是costsin²tdt=sin²tdsint=(sint)^3/3(0->2pi)=0.
前面那个又可以拆成两个，前面一个是二分之一，得到的是pi, 后面那个是cos2x /2·dx=cos2x /4·d2x=sin2x/4(0->2pi)=0.
所以结果=pi.

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