When do I use lim(x→0) sin x / x = 1 in Limits & Continuity, and what does it mean?
a fundamental trigonometric limit.
lim(x→0) sin x / x = 1 — a fundamental trigonometric limit. Use it when: x measured in radians. Always check the condition holds before plugging in numbers.
Key point
lim(x→0) sin x / x = 1
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