Widget Scientific Calculator

WidgetCALC : WIDGET SCIENTIFIC CALCULATOR
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* Cos (), Arccos ()
* Sin ( ) Arcsin ()
* tan (), arctan ()
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* Power
* Square root
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* Factorial
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* Transformation in decimal degrees minutes seconds
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* combination
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* Log ( )
* Ln ()
* e exponential
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* Ans
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* Convert a decimal to a fraction ( improve in the update )
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