+0  
 
+1
952
1
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hello, simplify without a calculator

 

\(Cos 240 \over Cos 180 -Sin90\)

 

thanx for the help...

 May 31, 2019
 #1
avatar+12531 
+3

hello, simplify without a calculator

 May 31, 2019
edited by Omi67  May 31, 2019

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