23/02/16 16:45:32.59 5KmDa58u.net
>>859
cos(θ)=(e^iθ+e^(-iθ))/2
sin(θ)=(e^iθ-e^(-iθ))/2i
((e^iθ+e^(-iθ))/2)^2+((e^iθ-e^(-iθ))/2i)^2 =1
23/02/16 16:45:32.59 5KmDa58u.net
>>859
cos(θ)=(e^iθ+e^(-iθ))/2
sin(θ)=(e^iθ-e^(-iθ))/2i
((e^iθ+e^(-iθ))/2)^2+((e^iθ-e^(-iθ))/2i)^2 =1