If cot A = {1}/{\sqrt{3}} , then what is the value of \frac{1−\cos ⁡2A}{1 + \cos ⁡2A}?

RRB NTPC CBT I 10 Jan 2021 Shift 2 Paper

Question : 20 of 100

Marks: +1, -0

If cot A =

\;{1}/{{√{3}}}

, then what is the value of

\;{1−\cos\;⁡2A}/{1\;+\;\cos\;⁡2A}

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