AMC 12A 2017 Problem 15

Let f(x)=\sin x+2 \cos x+3 \tan x, using radian measure for the variable x. In what interval does the smallest positive value of x for which f(x)=0 lie?

Answer Choices
A. (0,1)
B. (1,2)
C. (2,3)
D. (3,4)
E. (4,5)