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Math Help - cosh and sinh

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    cosh and sinh

    sinh x = 2.75 find cosh x exactly...???
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by helmszee View Post
    sinh x = 2.75 find cosh x exactly...???
    recall that \cosh^2 x - \sinh^2 x = 1
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    Quote Originally Posted by Jhevon View Post
    recall that \cosh^2 x - \sinh^2 x = 1
    but mine arn't cosh^2 or sinh^2 what do i do with the ^2?
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    is up to his old tricks again! Jhevon's Avatar
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    Quote Originally Posted by helmszee View Post
    but mine arn't cosh^2 or sinh^2 what do i do with the ^2?
    umm, you square the answer you have for sinh(x) plug it into the formula, solve for cosh^2(x) and then square root both sides
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