Final answer:
The question essentially asks to prove that a continuous and periodic function, with specific values at the endpoints of an interval, has a root within that interval according to the Intermediate Value Theorem.
Step-by-step explanation:
The question involves applying the Intermediate Value Theorem to a continuous function to find a number c for which f(c) is equal to 0 within a specified interval. Specifically, it is suggested that the function in question has particular values f(0) = -10 and f(1) = 6 - cos(1) > 0. The continuity of the function ensures that if it changes sign over the interval [0, 1], there must be at least one point within that interval where the function is zero. Since the function is periodic and continuous, the Intermediate Value Theorem guarantees the existence of such a point, labeled c, where 0 ≤ c ≤ 1 and f(c) = 0.