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Prove the hyperbolic identity cosh(61 + 62) = cosh(61 ) cosh (62) + sinh(61 ) sinh(02) , for all real 61, 82. Make sure you

Prove the hyperbolic identity cosh(61 + 62) = cosh(61 ) cosh (62) + sinh(61 ) sinh(02) , for all real 61, 82. Make sure you clearly state any results you use

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