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Showing content from https://dlmf.nist.gov/4.36 below:

§4.36 Infinite Products and Partial Fractions ‣ Hyperbolic Functions ‣ Chapter 4 Elementary Functions

§4.36 Infinite Products and Partial Fractions ⓘ
Keywords:
hyperbolic functions, infinite products, partial fractions
Notes:
Replace z by i ⁢ z in §4.22.
Permalink:
http://dlmf.nist.gov/4.36
See also:
Annotations for Ch.4
4.36.1 sinh ⁡ z = z ⁢ ∏ n = 1 ∞ ( 1 + z2 n2 ⁢ π2 ) , ⓘ
Symbols:
π : the ratio of the circumference of a circle to its diameter, sinh ⁡ z : hyperbolic sine function, n : integer and z : complex variable
A&S Ref:
4.5.68
Permalink:
http://dlmf.nist.gov/4.36.E1
Encodings:
TeX, pMML, png
See also:
Annotations for §4.36 and Ch.4
4.36.2 cosh ⁡ z = ∏ n = 1 ∞ ( 1 + 4 ⁢ z2 ( 2 ⁢ n − 1 ) 2 ⁢ π2 ) . ⓘ
Symbols:
π : the ratio of the circumference of a circle to its diameter, cosh ⁡ z : hyperbolic cosine function, n : integer and z : complex variable
A&S Ref:
4.5.69
Permalink:
http://dlmf.nist.gov/4.36.E2
Encodings:
TeX, pMML, png
See also:
Annotations for §4.36 and Ch.4

When z ≠ n ⁢ π ⁢ i , n ∈ ℤ ,

4.36.3 coth ⁡ z = 1 z + 2 ⁢ z ⁢ ∑ n = 1 ∞ 1 z2 + n2 ⁢ π2 , ⓘ
Symbols:
π : the ratio of the circumference of a circle to its diameter, coth ⁡ z : hyperbolic cotangent function, n : integer and z : complex variable
Permalink:
http://dlmf.nist.gov/4.36.E3
Encodings:
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See also:
Annotations for §4.36 and Ch.4
4.36.4 csch2 ⁡ z = ∑ n = − ∞ ∞ 1 ( z − n ⁢ π ⁢ i ) 2 , ⓘ
Symbols:
π : the ratio of the circumference of a circle to its diameter, csch ⁡ z : hyperbolic cosecant function, i : imaginary unit, n : integer and z : complex variable
Permalink:
http://dlmf.nist.gov/4.36.E4
Encodings:
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See also:
Annotations for §4.36 and Ch.4
4.36.5 csch ⁡ z = 1 z + 2 ⁢ z ⁢ ∑ n = 1 ∞ ( − 1 ) n z2 + n2 ⁢ π2 . ⓘ
Symbols:
π : the ratio of the circumference of a circle to its diameter, csch ⁡ z : hyperbolic cosecant function, n : integer and z : complex variable
Permalink:
http://dlmf.nist.gov/4.36.E5
Encodings:
TeX, pMML, png
See also:
Annotations for §4.36 and Ch.4

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