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As title says.

 Oct 16, 2017

Best Answer 

 #1
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Cos(x)=√2/2 , xϵ[-π, π]

 

\(cos(x)=\frac{\sqrt2 }{2}=\frac{1}{\sqrt2}\\ x=\pm \frac{\pi}{4}\)

 

 

If you want/need more explanation then ask :)

.
 Oct 16, 2017
edited by Melody  Oct 16, 2017
 #1
avatar+99301 
+4
Best Answer

Cos(x)=√2/2 , xϵ[-π, π]

 

\(cos(x)=\frac{\sqrt2 }{2}=\frac{1}{\sqrt2}\\ x=\pm \frac{\pi}{4}\)

 

 

If you want/need more explanation then ask :)

Melody Oct 16, 2017
edited by Melody  Oct 16, 2017

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