Hyperbolic Trigonometric Identity: cosh(x+y)

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  • matheasysolutions reply I don't always prove the hyperbolic trig identity for cosh(x+y) but when I do I usually go from start to finish ;) View Video Notes on Steemit: https://steemit.com/mathematics/@mes/video-notes-hyperbolic-trigonometric-identity-cosh-x-y #GetOnSteem
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