Cos(x)=√2/2 , xϵ[-π, π]

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As title says.

Guest Oct 16, 2017

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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

Melody · Answer 1 · 2017-10-16T10:51:31

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 :)