DLMF:4.35.E27 (Q1901)

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DLMF:4.35.E27
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    Statements

    test
    cosh ⁡ ( 2 ⁢ z ) = 2 ⁢ cosh 2 ⁡ z - 1 = 2 ⁢ sinh 2 ⁡ z + 1 = cosh 2 ⁡ z + sinh 2 ⁡ z , 2 𝑧 2 2 𝑧 1 2 2 𝑧 1 2 𝑧 2 𝑧 {\displaystyle{\displaystyle\cosh\left(2z\right)=2{\cosh^{2}}z-1=2{\sinh^{2}}z% +1\\ ={\cosh^{2}}z+{\sinh^{2}}z,}}
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    DLMF id
    DLMF:4.35.E27
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