DLMF:4.21.E38 (Q1742)

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No description defined

Language	Label	Description	Also known as
English	DLMF:4.21.E38	No description defined

Statements

Defining formula

{\displaystyle{\displaystyle\cos z=\cos x\cosh y-\mathrm{i}\sin x\sinh y,}}

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DLMF:4.21.E38

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cosine function

Defining formula

{\displaystyle{\displaystyle\cos\NVar{z}}}

C4.S14.E2.m2azdec

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hyperbolic cosine function

Defining formula

{\displaystyle{\displaystyle\cosh\NVar{z}}}

C4.S28.E2.m2aadec

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hyperbolic sine function

Defining formula

{\displaystyle{\displaystyle\sinh\NVar{z}}}

C4.S28.E1.m2aadec

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Defining formula

{\displaystyle{\displaystyle\mathrm{i}}}

C1.S9.E1.m2abdec

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Defining formula

{\displaystyle{\displaystyle\sin\NVar{z}}}

C4.S14.E1.m2aydec

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Defining formula

{\displaystyle{\displaystyle x}}

C4.S1.XMD6.m1adec

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Defining formula

{\displaystyle{\displaystyle y}}

C4.S1.XMD7.m1adec

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Defining formula

{\displaystyle{\displaystyle z}}

C4.S1.XMD8.m1tdec

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Sitelinks

Wikipedia(0 entries)

DRMF related sites(0 entries)

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