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// Properties of Math.cosh that are guaranteed by the spec.
// If x is NaN, the result is NaN.
assertEq(Math.cosh(NaN), NaN);
// If x is +0, the result is 1.
assertEq(Math.cosh(+0), 1);
// If x is −0, the result is 1.
assertEq(Math.cosh(-0), 1);
// If x is +∞, the result is +∞.
assertEq(Math.cosh(Infinity), Infinity);
// If x is −∞, the result is +∞.
assertEq(Math.cosh(-Infinity), Infinity);
reportCompare(0, 0, "ok");