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Math Help - How do I simplify this expression?

  1. #1
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    How do I simplify this expression?

    I would like to simplify:

    \sqrt{e^{-2t} + e^{2t} + 2},

    as I have to take the integral of this
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  2. #2
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    Quote Originally Posted by jenkki View Post
    I would like to simplify:
    \sqrt{e^{-2t} + e^{2t} + 2},
    as I have to take the integral of this
    Just a little algebra gets us:
    \sqrt{e^{-2t} + e^{2t} + 2}=\dfrac{e^{2t}+1}{e^t}
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  3. #3
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    Here's one more hint for you in case you don't see the "intermediary steps" in Plato's computation.

    Compute (e^t+e^{-t})^2 by FOILing.
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