PG entrance exam CUET PG 2025 Mock Test Engineering Mathematics Differential Equations

If sin \(u = \frac{x^3 + y^3}{\sqrt{x} +\sqrt{y}}\), then xux + yuy will be equal to:

1
\(\frac{5}{2} tan \ u\)
2
\(\frac{3}{2} tan \ u\)
3
\(\frac{1}{2} cot \ u\)
4
\(\frac{3}{2} cot \ u\)
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