Limits of Trig Functions - Expii

Trigonometric functions, like sin(x), cos(x), tan(x) or csc(x), sec(c), cot(x) are continuous on their domain, so the substitution rule applies when evaluating limits of trig functions (within their domains). However, some common limits involving trig functions, like the limit of sin(x)/x at x=0, may require other methods like the squeeze theorem.