Basic Math Examples

$\cos (\frac{π}{7}) + \cos (\frac{2 π}{7}) + \cos (\frac{3 π}{7}) + \cos (\frac{4 π}{7}) + \cos (\frac{5 π}{7}) + \cos (\frac{6 π}{7})$

Step 1

The result can be shown in multiple forms.

Exact Form:

$\cos (\frac{π}{7}) + \cos (\frac{2 π}{7}) + \cos (\frac{3 π}{7}) + \cos (\frac{4 π}{7}) + \cos (\frac{5 π}{7}) + \cos (\frac{6 π}{7})$

Decimal Form:

$2.22044604 \cdot 10^{- 16}$