單項選擇題

過點M0(-1,1)且與曲線2ex-2cosy-1=0上點(0,π/3)的切線相垂直的直線方程是:()

A.y-π/3=(/2)x
B.y-π/3=-(2/)x
C.y-1=(/2)(x+1)
D.y-1=-(2/)(x+1)