sin(π/7)sin(2π/7)sin(3π/7) 2024-11-132024-11-10 by ejsoon 題一:請計算 sin(\pi/7)sin(2\pi/7)sin(3\pi/7) 題二:證明sin((2\pi)/7)+sin((4\pi)/7)+sin((8\pi)/7) = \sqrt{7}/2 答案在第二頁 Read more Pages: 1 2