Liczby zespolone kąt cos i sin

[chodzik]

1 + i

x=1 y=1 r=\(\displaystyle{ \sqrt{2}}\)

cos \(\displaystyle{ \alpha}\)=\(\displaystyle{ \frac{ \sqrt{2}}{2}}\)
sin \(\displaystyle{ \alpha}\) =\(\displaystyle{ \frac{ \sqrt{2}}{2}}\)

\(\displaystyle{ \alpha}\) = ?

[sea_of_tears]

\(\displaystyle{ \alpha=\frac{\pi}{4}}\)