### Trig Identity question If z = cos x + i sin x, then 1 - z = 2 sin(x/2) {sin (x/2) - i cos (x/2) }?

A http://www.door2math.com production. Dr. Pan makes learning math Fun. Trig Identity question? If z = cos x + i sin x, Show that 1 - z = 2 sin(x/2) {sin (x/2) - i cos (x/2) }

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