9000070101
Część:
A
Wyrażenie
\[
\left (\cos \frac{\pi }
{4} + \mathrm{i}\sin \frac{\pi }
{4}\right )^{3}
\] jest równe:
\(-\frac{\sqrt{2}}
{2} + \mathrm{i}\frac{\sqrt{2}}
{2} \)
\(-\frac{\sqrt{2}}
{2} -\mathrm{i}\frac{\sqrt{2}}
{2} \)
\(\frac{\sqrt{2}}
{2} -\mathrm{i}\frac{\sqrt{2}}
{2} \)
\(\frac{\sqrt{2}}
{2} + \mathrm{i}\frac{\sqrt{2}}
{2} \)