Trigonometry Examples

$\cos (10) \cos (80) - \sin (10) \sin (80)$

Step 1

The result can be shown in multiple forms.

Exact Form:

$\cos (10) \cos (80) - \sin (10) \sin (80)$

Decimal Form:

$0$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$