Vault Of Euclid

Evaluating the Limit of sin(x)/x as x Approaches 0

Limits warmup

\[ \lim_{x\to 0} \frac{\sin x}{x} \]
calculus-ilimitsl-hopitalindeterminate-formstrigonometric-functionssinecosineevaluate-limitderivativesfundamental-trigonometric-limit

The solution and a full step-by-step explanation are here. Sign in to read them.

What you need first

What this problem tests

Tests the ability to recognize a 0/0 indeterminate form and correctly apply L'Hôpital's rule by differentiating the numerator and denominator.

This is one of the most famous limits in early calculus. While usually proven geometrically to establish the derivatives of trigonometric functions, it is often revisited later as a straightforward application of L'Hôpital's rule.

More on Limits