+0  
 
+10
422
3
avatar+1833 

 

 

 

 

scribbler

 Feb 5, 2017
edited by EighthMersennePrime  Feb 5, 2017
 #1
avatar+111431 
0

cos ( x) =  0.4

 

arcos (0.4)  = x ≈ 66.42°  + n*360°, -66.42°  + n*360°,  

 

 

cool cool cool  

 Feb 5, 2017
 #2
avatar+1833 
+10

Just curious, why do you put coolcoolcool at the end of every answer?

 #3
avatar+111431 
+5

It's my "trademark"......LOL!!!!!

 

 

cool cool cool

 

See ????

 Feb 5, 2017

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