How do you solve question 11? The picture attached shows the question

113. [5 marks] . \\' ' N (i) Show thawctan + ln(sec6 + tan6)) = Zsec36 . [ii] Hence write down I sec36d6 . 11b. [24 marks] Consider the differential equation (1 + x2) 2: + xy = 1 + 3::2 given that y = 1 when x = 0 . (i) Use Euler's method with a step length of 0.1 to nd an approximate value for y when x = 0.3 . [ii] Find an integrating factor for determining the exact solution of the differential equation. (iii) Find the solution of the equation in the form y = f (x) . (iv) To how many significant gures does the approximation found in part (i) agree with the exact value ofy when x = 0.3