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 how do i get cos to the minus one?

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how do i get cos to the minus one?

 May 5, 2014

Best Answer 

 #1
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Press 2nd then acos, or just type acos.  

 May 5, 2014

1+0 Answers

 #1
avatar+33665 
+5
Best Answer

Press 2nd then acos, or just type acos.  

Alan May 5, 2014

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