cosh (clj)

function

(cosh x)

Returns the hyperbolic cosine of x, (e^x + e^-x)/2. If x is ##NaN => ##NaN If x is ##Inf or ##-Inf => ##Inf If x is zero => 1.0 See: https://docs.oracle.com/javase/8/docs/api/java/lang/Math.html#cosh-double-

Examples

clojure

(ns clojure.test-clojure.math
  (:require
    [clojure.test :refer :all]
    [clojure.math :as m]))

(deftest test-cosh
  (is (NaN? (m/cosh ##NaN)))
  (is (= ##Inf (m/cosh ##Inf)))
  (is (= ##Inf (m/cosh ##-Inf)))
  (is (= 1.0 (m/cosh 0.0))))