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anonymous

  • 5 years ago

if cos(pi/4) is sqrt2/2 i thought sec(pi/4) is 2/sqrt 2,but its just sqrt 2 . can some one please explain.

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  1. bahrom7893
    • 5 years ago
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    Okay: \[2/\sqrt{2} = (\sqrt{2})^2/\sqrt{2} = \sqrt{?}\]

  2. bahrom7893
    • 5 years ago
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    sqrt(2), i meant lol not question mark

  3. anonymous
    • 5 years ago
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    2/sqrt(2) and sqrt(2) are the same. Just rationalize as bahrom did.

  4. anonymous
    • 5 years ago
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    oh i see so i have to rationalize it. thank you guys

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