tion of the centroid of an arc of a circle is given by rsin Determine the angle for which x 4 Hint: first, derive the equation that must be solved, i.e.f(a) 0 (a) Use the bisection method. Start with a 0.5 and b1.5, and carry out the first four iterations. (10 pts) (b) Use the secant method. Start with the two points a 0.5 and a2 1.5, and carry out the first four iterations. (10 pts)