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Math Help - Would anyone be able to explain this problem to me step by step?

  1. #1
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    Would anyone be able to explain this problem to me step by step?

    Would anyone be able to explain this problem to me step by step?-stepbystep.png
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  2. #2
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    Re: Would anyone be able to explain this problem to me step by step?

    Both \cos(\theta) and \sec(\theta) are continuous functions on an open interval containing 0; \sin(u) is continuous over all real numbers; and 5\sec(0) \neq 0, you simply plug in zero. That is the only step.
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