Opened 7 months ago

## #1833 new defect

# inaccuracy in exponential functions

Reported by: | sjain59 | Owned by: | |
---|---|---|---|

Priority: | minor | Milestone: | someday |

Component: | unknown | Version: | 5.3.0 |

Keywords: | Cc: | ||

Estimated difficulty: |

### Description

I wish to bring to your kind notice the following:

(sin -1e-6i), whose magnitude should be sinh, gives inaccurate answer, in comparison SCM scheme for the same expression, gives the correct C function answer. The discrepancy is related to the C functions expm1 and log1p which are needed for small x.

Another thing I noticed is the expression (sin 1e-6i) gives the error 1e-6 unbound variable, whereas in the expression (sin +1e-6i) it is correctly recognized as a number.

Thanks.

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