SSC CGL 3 Dec 2022 Shift 2 Paper

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Question : 55 of 100

Marks: +1, -0

If

X + \;{1}/{X}

= 2 cos

θ

, then

X^{3} + \;{1}/{X^{3}}

= ?

2 cos $2θ$
cos $3θ$
2 cos $3θ$
cos $2θ$

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