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, x y = 1 x > 1 , cosh sinh. (1,1) 2√ , cosh sinh .,
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cosh t >= 1 t.
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t ,.
cosh x , y.
sinh x is an , -sinh x = sinh -x, sinh 0 = 0.
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sine sinh cosine cosh, 2, 6, 10, 14,... sinh's. .
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sinh x cosh x cosh x sinh x; . cos x −sin x.
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a*cosh x/a , .
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. sinh z cosh z .
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