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If x = cosθ, then find the value of (x6 + 1/x6) |
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Answer» ∵ x = cosθ + isinθ ⇒ x6 = (cos θ + isinθ)6 = cos6θ + isin6θ ⇒ 1/x6 = cos6θ – isin6θ ∴ x6 + 1/x6 = 2cos6θ |
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