题目
由方程y=sin(x+y)所确定的隐函数的导数(dy)/(dx)=（）.A. cos(x+y);B. (1)/(1-cos(x+y));C. (cos(x+y))/(1-cos(x+y));D. (1+cos(x+y))/(1-cos(x+y)).
由方程$y=\sin(x+y)$所确定的隐函数的导数$\frac{dy}{dx}=$（）.
A. $\cos(x+y);$
B. $\frac{1}{1-\cos(x+y)};$
C. $\frac{\cos(x+y)}{1-\cos(x+y)};$
D. $\frac{1+\cos(x+y)}{1-\cos(x+y)}.$
题目解答
答案
C. $\frac{\cos(x+y)}{1-\cos(x+y)};$