\(\cot \theta = \frac{x}{y}\) எனில் \(\frac{x \sin \theta + y \cos \theta}{x \cos \theta + y \sin \theta}=\)

1
\(\frac{2xy}{x^2+y^2}\)
2
\(\frac{x+y}{x^2+y^2}\)
3
\(\frac{x^2+y^2}{x+y}\)
4
\(\frac{xy}{x+y}\)

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