Question

Part of the domain of the function f(x) = √((cosx - 1/2)/(6 + 35x - 6x²)) lying in the interval [-1, 6] is

(a) [-1/6,  π/3]

(b) [5π/3, 6]

(c) [-1/5, π/3] ∪ [5π/3, 6]

(d) (-1/6, π/3] ∪ [5π/3, 6)

Comments

This question is the mixture of functions and trigonometry but it is easy if your trigonometry is decent

Answer 1

The correct option (d) (-1/6, π/3] ∪ [5π/3, 6)

Explanation: