Mutsetse wakakombama we cosine

Heino cosine semutsetse wakakombama, ne $\displaystyle x$ mumaradhiyani pamutsetse weakisi. Pa pai pamusoro pe 4, mutsetse wakakombama unomira pa $\displaystyle \frac{\sqrt{2}}{2}$, unenge 0.707: mhinduro yatichangowana.