Trigonometry Examples

$\cos (\frac{5 π}{18}) \sin (\frac{π}{9}) - \cos (\frac{π}{9}) \sin (\frac{5 π}{18})$

Step 1

The result can be shown in multiple forms.

Exact Form:

$\cos (\frac{5 π}{18}) \sin (\frac{π}{9}) - \cos (\frac{π}{9}) \sin (\frac{5 π}{18})$

Decimal Form:

$- 0.5$