假设X值在A1,Y值在B1,则在C1中输入:=(A1*A1+B1*B1)^0.5在D1中输入:=ATAN(B1/A1)*180/PI()
距离=(x^2+y^2)^(1/2)
A1对边,B1邻边C1=degrees(Atan(A1/B1))为什么一定要cot?