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cosh

n. 棍棒;護身用手杖

棍棒;護身用手杖

WordNet (r) 3.0 (2006) (WordNet)

cosh
n 1: a piece of metal covered by leather with a flexible handle;
used for hitting people [synonym: {blackjack}, {cosh}, {sap}]
v 1: hit with a cosh, usually on the head

The Collaborative International Dictionary of English v.0.48 (gcide)

cosh \cosh\ n.
a piece of leather-covered metal with a flexible handle; used
for hitting people. [slang]

Syn: blackjack, sap.
[WordNet 1.5]

cosh \cosh\ v.
1. .
[WordNet 1.5]

cosh \cosh\ v. t.
to hit (someone) with a cosh or similar bludgeon, usually on
the head. [slang]
[WordNet 1.5 PJC]

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英文字典中文字典相關資料:

Hyperbolic functions - Wikipedia
Just as the points (cos t, sin t) form a circle with a unit radius, the points (cosh t, sinh t) form the right half of the unit hyperbola Also, similarly to how the derivatives of sin (t) and cos (t) are cos (t) and –sin (t) respectively, the derivatives of sinh (t) and cosh (t) are cosh (t) and sinh (t) respectively
Hyperbolic Trigonometric Functions | Brilliant Math Science Wiki
\cosh a = \frac {e^ {a}+e^ {-a}} {2},\quad \sinh a = \frac {e^ {a}-e^ {-a}} {2} cosha = 2ea +e−a, sinha = 2ea −e−a These equations have their imaginary parts "ripped away "
Cosh: Definitions and Examples - Club Z! Tutoring
Cosh is defined as the ratio of the adjacent side of a right triangle to the hypotenuse, where the hypotenuse is the distance between the origin and a point on the hyperbola

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