If x satisfies the equation x^2-2 x \cos \theta+1=0, then the value of x^n+1 \/ x^n is equal to

CUSAT 2021 BTech Solved Paper Shift 2

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If x satisfies the equation x2−2x‌cos‌θ+1=0, then the value of xn+1∕xn is equal to

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