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Hyperbolic-function identity
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Mathematics
Area of mathematics
Analysis
Real analysis
Calculus
Hyperbolic tangent
2026-09-24
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The exponential
definitions
of the
hyperbolic functions
imply identities such
as
1
+
c
o
s
h
x
s
i
n
h
x
=
tanh
(
2
x
)
.
(1)
Ancestors
(7)
Hyperbolic tangent
Calculus
Real analysis
Analysis
Area of mathematics
Mathematics
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Past exam of the mathematics course of the University of Cambridge
/
2024
/
iii
/
Paper 303
/
1
/
b
/
ii
/
Solution
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