Texas Instruments
Texas Instruments: Special Limits
Students can use the graphing calculator to explore the limits of the functions sin(x)/x and (cos(x)-1)/x as x approaches zero.
Math Medics
S.o.s. Math: Sequences: Special Limits
This lesson discusses important limits of particular sequences that can be very "useful in many branches of science." Includes good proofs.
Stefan Warner and Steven R. Costenoble
Finite Mathematics & Applied Calculus: Proof of Some Trigonometric Limits
Students learn about two trigonometric limits. The resource consists of two proofs and diagrams.