\[z = \cos 4\theta + i\sin 4\theta
\equiv \binom{4}{0}c^{4}(is)^{0}+\cdots + \binom{4}{4}c^{0}(is)^{4}\]
\[z = \cos 4\theta + i\sin 4\theta
\equiv \binom{4}{0}c^{4}(is)^{0}+\cdots + \binom{4}{4}c^{0}(is)^{4}\]
\[z = \cos 4\theta + i\sin 4\theta
\equiv \binom{4}{0}c^{4}(is)^{0}+\cdots + \binom{4}{4}c^{0}(is)^{4}\]
\[z = \cos 4\theta + i\sin 4\theta
\equiv \binom{4}{0}c^{4}(is)^{0}+\cdots + \binom{4}{4}c^{0}(is)^{4}\]
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