Plane curves area calculation is one of the main applications of definite integral.
To get an area of the plane curve depicted in figure, one needs toof the form:
Functions and as a rule are known from a problem situation, abscisses of their cross points and need to be calculated. To do this one need to solve equation of the type:
By using the method above, one can also find the area between and disjoint curves, if the points and are initially given:
In such a case the crossed curve (figure which area we are calculating) is formed by functions , and the straight lines , .
Online area calculator based on Wolfram Alpha capable to calculate area between two crossed curves.