[Bugs] #4938 Calculate UNSP: Sine and Cosine producing wrong outputs

[Sugar Labs Bugs]

#4938: Sine and Cosine producing wrong outputs
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       Reporter:  Abrahm                     |       Owner:
           Type:  defect                     |      Status:  new
       Priority:  Unspecified by Maintainer  |   Milestone:  Unspecified
      Component:  Calculate                  |     Version:  Unspecified
       Severity:  Trivial                    |    Keywords:
Distribution/OS:  Ubuntu                     |  Bug Status:  Unconfirmed
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 For values ranging from 181 to 185 (in degrees) Sine gives positive values
 instead of negative values same thing happens for cosine in range of 91 to
 95 degrees . This error is also persistent in radian mode!

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Ticket URL: <https://bugs.sugarlabs.org/ticket/4938>
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