题目2.[单选题]1.3节随堂练习2.(sintheta+icostheta)^n=sin ntheta+icos ntheta,nin Z^+.()A. ×B. √2.[单选题]1.3节随堂练习2.$(\sin\theta+i\cos\theta)^{n}=\sin n\theta+i\cos n\theta,n\in Z^{+}$.()A. ×B. √题目解答答案A. ×