A) z [tex3]\cdot [/tex3] w = cos [tex3]\left(\frac{7\pi }{6}\right)[/tex3] + isen [tex3]\left(\frac{7\pi }{6}\right)[/tex3]
B) z+w= cos [tex3]\left(\frac{7\pi }{6}\right)[/tex3] + isen [tex3]\left(\frac{7\pi }{6}\right)[/tex3]
C) [tex3]z^{12}[/tex3] = cos [tex3]\left(\frac{4\pi }{3}\right)[/tex3] + isen [tex3]\left(\frac{4\pi }{3}\right)[/tex3]
D) [tex3]\frac{z}{w}[/tex3] = cos [tex3]\left(\frac{7\pi }{6}\right)[/tex3] - isen [tex3]\left(\frac{7\pi }{6}\right)[/tex3]
E) z= cos [tex3]\left(\frac{\pi }{3}\right)[/tex3] + isen [tex3]\left(\frac{\pi }{3}\right)[/tex3] e
w= 2 (cos [tex3]\left(\frac{7\pi }{4}\right)[/tex3] + isen [tex3]\left(\frac{7\pi }{4}\right)[/tex3] )
Resposta
E)
Por favor, explique como se chegar à resposta certa