题目已知x-2y+sin y=0,则(dy)/(dx)bigg|_(x=0y=0)的值为().A. -1B. 0C. 1D. (1)/(2)已知x-2y+sin y=0,则$\frac{dy}{dx}\bigg|_{x=0\\y=0}$的值为().A. -1B. 0C. 1D. $\frac{1}{2}$题目解答答案C. 1