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TN XII Math
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Complex Numbers
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Q)
Prove that $\left ( 1+\mathit{i} \right )^{\mathit{n}} + \left ( 1-\mathit{i} \right )^{\mathit{n}} = 2^{\large\frac{n+2}{2}} \cos \; \large\frac{n\pi}{4}$
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This is the first part of the multi-part question Q4.
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