[reynolds_master]

Hi! From a set of equations given, I've to isolate the different gammas, but I'm in trouble integrating an expression. In the images, the expression is the one with the velocities, and the problem is the INTEGRAL and its content. We know that this derivative is equal to the gradient projected in the n direction, and I have computed it with the help of Wolframalpha, and then substituted the terms where m=y and n=x (the control points of each panel), fixed numbers for each iteration, and expressed yj as a function of xj to integrate respect dxj, which is dSj=dxj/cosbj. How can I express this in MATLAB in order to obtain the gammas? I'm having trouble with the code needed. Thank you very much!