(sinθ-1/sinθ)^2 + (cosθ-1/cosθ)^2 - (tanθ-1/tanθ)^2 = sin^2 - 2 + csc^2 + cos^2 - 2 + sec^2 - tan^2 + 2 - cot^2 = - 2 + [sin^2 + cos^2] + ...
確定！ 回上一頁
