Area under curve \(y=\sqrt{a^2-x^2}\) included between the lines \(x=0\) and \(x=a\) is1\(\frac{\pi}{2}a^2\)2\(\frac{\pi}{4}a^2\)3\(\frac{\pi}{2}a\)4\(\frac{\pi}{4}a\)Answer & explanation+Correct answer: option 2Use integration
