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What is cos 135?

1 Answer

Dreamer.N · Stefan V.

May 7, 2018

The value of $cos 135$ $cos 135$ is $- \frac{1}{\sqrt{2}}$ $-1/sqrt(2)$ .

Explanation:

We have $cos 135$ $cos 135$ .

$135 = \frac{3 π}{4}$ $135= (3pi)/4$

So

$cos (\frac{3 π}{4}) = cos (π - \frac{π}{4})$ $cos((3pi)/4)=cos(pi-pi/4)$

$= - cos (\frac{π}{4})$ $=-cos(pi/4)$

$= - \frac{1}{\sqrt{2}}$ $=-1/sqrt2$

Hope it helps!!

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