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Can someone please help me with a calculus problem?

+2 votes
Evaluate the limit using L'Hopital's rule: lim 9cos(-7x)sec(-5x) when x approaches x/2

(Please show work so I can understand.)
asked Feb 7, 2013 in CALCULUS by angel12 Scholar

1 Answer

+2 votes

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Reciprocal identities: sec(θ) = [1 / cos(θ)]

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Even-Odd Identities: cos(-θ) = cosθ and sec(-θ) = secθ

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L'Hopital's Rule:

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Derivative of Trigonometric Functions:

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answered Feb 7, 2013 by britally Apprentice

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