Find the Exact Value cos(2)(pi/2)

$\cos (2) (\frac{π}{2})$

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

$\frac{\cos (2) π}{2}$

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

$\frac{π \cos (2)}{2}$

The result can be shown in multiple forms.

Exact Form:

$\frac{π \cos (2)}{2}$

Decimal Form:

$- 0.65368192 \dots$