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I am co-author of the Mathematical Association book "Teaching A level Maths" available here: https://members.m-a.org.uk/Shop/product/1188

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I am co-author of the Mathematical Association book "Teaching A level Maths" available here: https://members.m-a.org.uk/Shop/product/1188
The two solutions of the equation cosh x = a
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The two solutions of the equation cosh x = a

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This worksheet looks in more detail at why cosh x = a has 2 solutions even though arcosh x is uniquely defined, and the different ways these 2 solutions can be expressed. Key words: hyperbolics, equations, inverse hyperbolic functions