Plz help me integrating the integral below...I did it to a certain point and got stuck...here is the integral and what I did:(adsbygoogle = window.adsbygoogle || []).push({});

1)

Integral form 0 to pi/2, integral from 0 to a*sin(2*theta), [ r ]dr dtheta

Inner integral: Int from 0 to a*sin(2theta) [(r^2)/2] dr = [a^2 * (sin(2 theta))^2 ] / 2

Outer integral: Int from 0 to pi/2 [a^2 * (sin(2 theta))^2 ] / 2] dtheta

....this is when I dont know how to integrate...plz show me!

2)

Integral from 0 to pi/2, integral from 0 to 1 [sin(r^2)]dr dtheta...how do I integrate this? (how do I integrate sin(r^2)?)

Thanks

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# Double Integral

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