Table of Contentscosh - hyperbolic cosine function #include <math.h>
double cosh(double x); The cosh() function returns the hyperbolic cosine of x, which is defined mathematically as exp(x) + exp(-x) / 2. SVID 3, POSIX, BSD 4.3, ISO 9899 acosh(3), asinh(3), atanh(3), sinh(3), tanh(3)
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