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Question

Evaluate the limit as x approaches 0 of [tan(x+Δx)-tan(x)] /Δx:


sec^ 2 (x)

cot (x)

sec (x)

does not exist
11 years ago

Answers

Steve
This is handily explained at

http://answers.yahoo.com/question/index?qid=20100519122921AAIzxX9
11 years ago

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