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Name:

cosh the hyperbolic cosine function.

Library names:

sollya_obj_t sollya_lib_cosh(sollya_obj_t) sollya_obj_t sollya_lib_build_function_cosh(sollya_obj_t) #define SOLLYA_COSH(x) sollya_lib_build_function_cosh(x)

Description:

cosh is the usual hyperbolic function: cosh(x) = (exp(x)+exp(-x))/2.
It is defined for every real number x.