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so now we've been able to express our disigma

2
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i think we're pretty close to evaluating the interval itself

3
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one thing i do want to point out that might have been nagging you from the last video

4
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the end of the last video took the principal root of the cosign

5
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of cosign squared of T

6
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cosign of T. And you might have said wait wait wait wait, what if cosign of T evaluated

7
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to a negative number, if i then squared it would've been positive and then if i were to take the principle