engineering recuitment GATE ECE 2023-24 Test Series Engineering Mathematics Calculus Multiple Integrals
\(\mathop \smallint \limits_0^1 \mathop \smallint \limits_0^1 \frac{{dx\;dy}}{{\sqrt {1 - {x^2}} \sqrt {1 - {y^2}} }} = \)
1
\(\frac{\pi}{4}\)
2
\(\frac{\pi^2 }{4}\)
3
\(\frac{\pi }{4}\)
4
π