简单数学!!
\u7b80\u5355\u6570\u5b66\uff01\uff01\u56e0\u4e3asin65\u548ccos25\u7684\u503c\u76f8\u540c\uff0c\u800csin20\u548ccos70\u7684\u503c\u76f8\u540c\uff0c\u6240\u4ee5\u53ef\u4ee5\u8fdb\u884c\u5e26\u6362\uff0c\u53d8\u6210sin70cos25-cos70sin25\uff0c\u7136\u540e\u7528\u516c\u5f0f\uff0c\u53ef\u4ee5\u5199\u6210sin\uff0870-25\uff09=sin45\uff0c\u6240\u4ee5\u7b54\u6848\u662f\u4e8c\u5206\u4e4b\u6839\u4e8c
c.d.b.b.c.a
口诀:“左加右减上加下减”左加右减是对自变量进行加减,上加下减是对整个函数进行加减
题目里说明图形向左移动1,向上移动1
所以是y=cos(x+1)+1
觉得好的话请采纳!
简单讲就是向上向左平移ma 左加右减
cos(x-2)+3
y=cos(x-2)+3
左加右减上加下减
y=cos(x+1)+1
希望可以帮到你,有问题欢迎追问:)
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