Fix f64 variants of math.cosh and math.sinh to accept negative inputs. (#5172)
* add tests for negative inputs to cosh32 and cosh64. fix bug in cosh64 for negative inputs.
* fix problem with negative input with f64 sinh and add tests
28c31a8429Nick Appleton committed on 4/26/2020, 6:03:19 PM· committed by GitHubparentd44c9bd