The root of the equation f(x) = 0 is found by using the secant method. the initial guesses are x-1 = 3.6 and x0 = 1.5. given that f(3.6) = 7.1 and f(1.5) = 3.9, the angle the secant line makes with the x axis is (report your answer in in degrees ; keep 4 decimal places.)