[Bugs] #4936 Calculate NORM: Sine and Cosine producing wrong outputs

[Sugar Labs Bugs]

#4936: Sine and Cosine producing wrong outputs
------------------------+-------------------------------
  Reporter:  Abrahm     |            Owner:
      Type:  defect     |           Status:  new
  Priority:  Normal     |        Milestone:  Unspecified
 Component:  Calculate  |          Version:  Unspecified
  Severity:  Minor      |       Resolution:
  Keywords:             |  Distribution/OS:
Bug Status:  New        |
------------------------+-------------------------------

Comment (by quozl):

 Thanks.  Please see https://github.com/sugarlabs/sugarlabs-
 calculate/pull/37 for the further work required before this pull request
 is merged.

 Other pull requests were not a solution:
  * ​https://github.com/godiard/sugarlabs-calculate/pull/28
  * ​https://github.com/godiard/sugarlabs-calculate/pull/30

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Ticket URL: <https://bugs.sugarlabs.org/ticket/4936#comment:4>
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