Evaluate cos(2)(pi/4)

$\cos (2) (\frac{π}{4})$

Step 1

Combine $\cos (2)$ and $\frac{π}{4}$ .

$\frac{\cos (2) π}{4}$

Step 2

Reorder factors in $\frac{\cos (2) π}{4}$ .

$\frac{π \cos (2)}{4}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{π \cos (2)}{4}$

Decimal Form:

$- 0.32684096 \dots$

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