Question: In Exercises 5557, evaluate using the result of Exercise 54. Data From Exercise 54 Investigate numerically or graphically. Then prove that the limit is equal

In Exercises 55–57, evaluate using the result of Exercise 54.


Data From Exercise 54

Investigate lim h0 1 - cos h numerically or graphically. Then prove that the limit is equal to 1/2. See the proof of Theorem 2.

THEOREM 2 Important Trigonometric Limits sin 0 lim 0-0 0 = 1| and lim 0-0 1- cos 0 0 = 0

lim h0 cos 3h - 1 h


lim h0 1 - cos h

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