Find the Exact Value cos((2pi)/3)^2+sin((2pi)/3)^2

$\cos^{2} (\frac{2 π}{3}) + \sin^{2} (\frac{2 π}{3})$

Rearrange terms.

$\sin^{2} (\frac{2 π}{3}) + \cos^{2} (\frac{2 π}{3})$