calculs 3

Note: please write down the Answer by hand on paper and also write each answer with the number of the questions

5. Evaluate the following integrals. (a) (z + y)didy, where D is the triangular region bounded by the lines y = x, 2y + x = 6, and the x-axis. ( b ) sec (2 2 + y? ) dady , where D is the region defined by x2 + y