Find the range of f(x)=tan(x)+sec(x)f(x) = \tan(x) + \sec(x)f(x)=tan(x)+sec(x) for x∈(−π/2,π/2)x \in (-\pi/2, \pi/2)x∈(−π/2,π/2).
(−∞,∞)(-\infty, \infty)(−∞,∞)
(0,∞)(0, \infty)(0,∞)
(1,∞)(1, \infty)(1,∞)
[1,∞)[1, \infty)[1,∞)