This depends on what you are integrating with respect to. Let's assume: x.
Integral of 9*pi = 9*pi*x + C.
However, if you are integrating with respect to pi, then
integral of 9*pi is (9/2)pi^2 + C
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Integral from 0 to pi 6sin2xdx: integral of 6sin2xdx (-3)cos2x+c. (-3)cos(2 x pi) - (-3)cos(2 x 0) -3 - -3 0
Yes 9 times pi is an irrational number because it can't be expressed as a fraction
3.1415925
Circumference: 2*pi*3 = 6*pi inches Area: pi*3 squared = 9*pi square inches
The integral of root(sin(x)) is -2 time the elliptic integral of the second order of .25(pi-2x) at 2. For this and other integrals, go to http://integrals.wolfram.com/index.jsp?expr=sqrt(sin(x))&random=false For more information on the elliptic integral functions, go to http://en.wikipedia.org/wiki/Elliptic_integral Hope this helps!