COSH(x)
COSH function returns the hyperbolic cosine of @x, which is defined mathematically as (exp(@x) + exp(-@x)) / 2. @x is in radians. This function is Excel compatible.
COSH(0.5) equals 1.127626. COSH(1) equals 1.543081.
COS , SIN , SINH , TAN , TANH , RADIANS , DEGREES , EXP