\"\"

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Prove that \"\".

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Consider \"\".

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Since the hyperbolic identity : \"\".

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\"\"

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Substitute \"\".

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\"\"

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\"\"

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Since \"\".

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Substitue \"\" and \"\" in the above equation.

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\"\".

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Apply logirthm on each side.

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\"\"

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Since \"\".

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\"\"

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Substitue \"\" in the above equation.

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\"\".

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\"\"

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\"\".