([2(cosπ/3+isinπ/3)]/[√2(cos (-π/4) +isin (-π/4)])^40
(√2 (cos (π/3+π/4) +isin7π/12)))^40
(√2) ^40*(cos70π/3+isin70π/3)
2^20 (cos4π/3+isin4π/3)
2^20(-1/2-i√3/2)
-2^20(1/2+i√3/2)
explicit
vezi attach
am considerat cunoscute
scrierea numerelor complexe sub forma trigonometrica, impartirea si ridicarea la putere acestora
