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how do you get negative tangent? the gray buttons show it's there but i don't know what to press to toggle it.

 Sep 28, 2017
 #1
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You don't want the "negative" tangent.....you want the "tangent inverse".....just press the "2nd"  key  and find the  "atan" (arctangent or tangent inverse)) function.....

 

 

 

cool cool cool

 Sep 28, 2017

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