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True or false:
r(cosθ+isinθ)=r(cos(θ2)+isin(θ2))\sqrt{r(\cos\theta + i\sin\theta)}=\sqrt{r}\left(\cos\left(\dfrac{\theta}{2}\right)+i\sin\left(\dfrac{\theta}{2}\right)\right)r(cosθ+isinθ)=r(cos(2θ)+isin(2θ))
where r>0r>0r>0.
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