Holly Guerrero

2021-12-19

What is the value of $\mathrm{cos}\frac{\pi }{4}$?

Stuart Rountree

Expert

$\mathrm{cos}\frac{\pi }{4}=\frac{\sqrt{2}}{2}$

lovagwb

Expert

The cosine of an angle is the x-value of a coordinate. At $\frac{\pi }{4}$ we can see that the x-value is $\frac{\sqrt{2}}{2}$.

RizerMix

Expert

$\mathrm{cos}45°$ or $\frac{\mathrm{cos}\pi }{4}$ is the same thing as $\frac{\sqrt{2}}{2}$