Find the Exact Value cos((1pi)/4)

$\cos (\frac{1 π}{4})$

Step 1

Multiply $π$ by $1$ .

$\cos (\frac{π}{4})$

Step 2

The exact value of $\cos (\frac{π}{4})$ is $\frac{\sqrt{2}}{2}$ .

$\frac{\sqrt{2}}{2}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{\sqrt{2}}{2}$

Decimal Form:

$0.70710678 \dots$