matlab points

vx4 = int (int ('2 * 2.5 * sqrt (1 – ((y ^ 2) / 2.25 ))',' y ', -1.5,' h / cos (10 * pi/180)-1.5-z * tan (10 * pi/180 )'),' z ', 0,4)
out how the plot is not analysis solution ah?

, You know, some primary function is not analytical solution, such as exp (* x ^ 2) there will be no original function, to have the analytical solution is only a small part of the analytical solution is no solution then the value is very Important, that is, numerical integration.Is to find approximate solutions, which need to consider the error.

I used to go for the points matlab, the answer is a long, it should be the exact solutions.