Thinking (11 marks) 5. Determine the exact value (no decimals) of the slope of the tangent line to f(x) = -2 sin x at the point where x = =. (2 marks) 6. Determine the equation of the tangent to y = -xe* + ex at x = 0. (3 marks)T. For what values of 'i' does the function y = e\" satisfy the differential equation 3/\" + 632' + 8y 2 0 ? (6 marks)