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To use the Squeeze Theorem (also known as the Sandwich Theorem), you need three functions: f(x)f(x)f(x), g(x)g(x)g(x), and h(x)h(x)h(x). If f(x)≤g(x)≤h(x)f(x) \leq g(x) \leq h(x)f(x)≤g(x)≤h(x) for values of xxx near a point aaa (except possibly at aaa itself) and if lim?x→af(x)=lim?x→ah(x)=L\lim_{{x \to a}} f(x) = \lim_{{x \to a}} h(x) = Llimx→a?f(x)=limx→a?h(x)=L, then lim?x→ag(x)=L\lim_{{x \to a}} g(x) = Llimx→a?g(x)=L as well. Essentially, if g(x)g(x)g(x) is "squeezed" between two functions that both approach the same limit LLL, then g(x)g(x)g(x) must also approach LLL. This theorem is often used in calculus to evaluate tricky limits.