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jcarpp jcarpp
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Derive the identity sec-1(-x) = π - sec-1 x by combining the following two equations:
cos-1(-x) = π - cos-1 x
sec-1 x = cos-1(1/x)
Textbook 

Calculus: Early Transcendentals


Edition: 3rd
Authors:
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Tim0301Tim0301
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More questions for this book are available here
sec-1(-x) = cos-1(-1/x) = π - cos-1(1/x) = π - sec-1 x

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