cos (x + y) = 0 మరియు sin (x - y) = \(\frac{1}{2}\) అయితే, ఇక్కడ x, y ϵ\(\left[ {0,\,\,\frac{{\rm{\pi }}}{2}} \right] \)  అయిన cot (2x - y) విలువ ఎంత?

1
0
2
\(\frac{1}{2}\)
3
1
4
2

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