+0  
 
+1
530
3
avatar+458 

acos(-1.4918334483551875) is an invalid argument? why?

 May 30, 2017
 #1
avatar
+2

It is invalid because your "cos" must between +1 and -1. That is the reason. 

 May 31, 2017
 #2
avatar+468 
+1

Yes, you are right guest!

AsadRehman  May 31, 2017
 #3
avatar+458 
0

why does it have to be in between 1 and -1?

ZZZZZZ  May 31, 2017

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