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    chobitz's Avatar
    chobitz Posts: 2, Reputation: 1
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    #1

    Jul 28, 2012, 04:08 AM
    integral of tanh^3 x sech x dx
    integral of tanh^3 x sech x dx
    chobitz's Avatar
    chobitz Posts: 2, Reputation: 1
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    #2

    Jul 28, 2012, 04:08 AM
    Can someone please help me with this problem, I have been trying to solve this for hours now and still no luck :(
    ebaines's Avatar
    ebaines Posts: 12,131, Reputation: 1307
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    #3

    Jul 29, 2012, 12:56 PM
    Try using integration by parts



    with

    .

    You will have to apply a couple of identities such as cosh^2x -sinh^2x =1. Post your attempt and we'll help you along if you get stuck.
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