设xsiny+ysinx=y 求y' siny+xcosy*y'+y'*sinx+ycosx=0 为啥cosy后面还加个y' sinx前面加个y'?
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设xsiny+ysinx=y 求y' siny+xcosy*y'+y'*sinx+ycosx=0 为啥cosy后面还加个y' sinx前面加个y'?
设xsiny+ysinx=y 求y' siny+xcosy*y'+y'*sinx+ycosx=0 为啥cosy后面还加个y' sinx前面加个y'?
设xsiny+ysinx=y 求y' siny+xcosy*y'+y'*sinx+ycosx=0 为啥cosy后面还加个y' sinx前面加个y'?
(ysin x)’=sin x+ycos x
设xsiny+ysinx=y 求y' siny+xcosy*y'+y'*sinx+ycosx=0 为啥cosy后面还加个y' sinx前面加个y'?
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