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inverse cosine of 1.21

 Jul 28, 2015

Best Answer 

 #1
avatar+109 
+6

I think that your problem is wrong, what is the rest of the problem before you got to the 1.21 point?

 Jul 28, 2015
 #1
avatar+109 
+6
Best Answer

I think that your problem is wrong, what is the rest of the problem before you got to the 1.21 point?

Biotomic121 Jul 28, 2015
 #2
avatar+33603 
+5

cosine only takes values between ±1, so there is no angle whose cosine is 1.21

.

 Jul 29, 2015

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