when generating a surface using the sqrt (4-x ^ 2) function and calculating its area the geogebra always says that the value is unknown. What am I missing?
Which command gives an unknown value? When I create the function f(x)=sqrt(4 - x^2) and use Integral(f, -3, 5), or other start and endnumbers, I get the results I want.
Please post your .ggb file
is the file
f(x) isn't defined above x=2. Try Integral(f, 0,2) instead of Integral(f, 0,3)
did not work that way
it works for me
perhaps you want the red Volumen in attached
also change Derivative(f)²)) by Simplify(Derivative(f)²))) because GG does integral(-1/sqrt(4-x^2)) =-asin(1/2x) and you expect acos(1/2 x) or use numerical integral or abs(integral(...................)) for area
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