LT34: Examine, but do NOT compute, this integral: S cos(80) sin? (50) do Part A: Show that the above integral is equivalent to this one: S(2 cos(180) + 2 cos(20) - 4 cos 80) ) de Part B: Think about your calculus courses. Which would you rather integrate? S cos(80) sin? (50) de or S(2 cos(180) + 2 cos(20) - 4 cos 80)) de