1 Mozilla/5.0 (Windows NT 5.1; rv:19.0) Gecko/20100101 Firefox/19.0 /rde/contents/library/ps2img/cgi-bin/eqn2gif.cgi 157.118.3.12 1362959031 2013/03/11 08:43:51 \begin{array}{r l} \displaystyle f(n)=&\cos((n-1)\theta+\theta) +i\sin((n-1)\theta+\theta)\\ =&\cos ((n-1)\theta) \cos\theta - \sin ((n-1)\theta) \sin\theta +i\sin ((n-1)\theta) \cos\theta+i\cos ((n-1)\theta) \sin\theta\\ =&\cos\theta (\cos ((n-1)\theta)+i\sin ((n-1)\theta) ) +i \sin \theta(\cos ((n-1)\theta) + \sin((n-1)\theta) )\\ =&(\cos\theta+i\sin\theta) (\cos ((n-1)\theta)+i\sin ((n-1)\theta )) \end{array} 20 <IMG SRC="../cgi-cache/20130311_083940.gif"> ______ 正常に処理されました 20130311_083940 Mon Mar 11 08:43:51 2013