Evaluate cos(2)((3pi)/4)

$\cos (2) (\frac{3 π}{4})$

Step 1

Combine $\cos (2)$ and $\frac{3 π}{4}$ .

$\frac{\cos (2) (3 π)}{4}$

Step 2

Simplify the expression.

Move $3$ to the left of $\cos (2)$ .

$\frac{3 \cdot \cos (2) π}{4}$

Reorder factors in $\frac{3 \cos (2) π}{4}$ .

$\frac{3 π \cos (2)}{4}$

$\frac{3 π \cos (2)}{4}$

Step 3

The result can be shown in multiple forms.

Exact Form:

$\frac{3 π \cos (2)}{4}$

Decimal Form:

$- 0.98052288 \dots$

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