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化简1.sin(a+p)cosa-cos(a+p)sina 2.sin(a-p)cosp+cos(a-p)sinp
人气:461 ℃ 时间:2020-06-27 17:50:35
解答
.sin(a+p)cosa-cos(a+p)sina=sin(a+p-a)=sin(p )
sin(a-p)cosp+cos(a-p)sinp=sin(a-p+p)=sin(a)
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