Question: Prove the identity. sinh ( x + y ) = sinh ( x ) cosh ( y ) + cosh ( x ) sinh (
Prove the identity.
sinhx y sinhx coshy coshx sinhy
First, use the definitions of the hyperbolic functions, and then simplify by combining the exponential terms.
sinhx coshy coshx sinhy
ex ex
ex ex
ey ey
ex y ex y ex y
ex y ex y ex y ex y
ex y
ex y
sinhx y
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