I am having difficulty integrating $\int (y + \sin(e^{x^2})) \, dx - 2x \, dy$, over the circle $x^2 + y^2 = 1$, traversed anti-clockwise.
I managed to do the differentiation and convert everything in terms of t, but I reach this step in the integration process, $-3\pi - \int_0^{2\pi} \sin(e^{\cos^2 t}) \sin(t) \, dt$, and then I don't know how to proceed from here. I tried integrating by parts but it doesn't seem to work.
Does anyone know how I should solve this problem? Thanks so much!