決戰三角

提供高效率的三角函數練習，解決學生三角函數入門的痛苦
以關卡形態提供學生循序漸進的練習，並加入排行使學生感受自身實力的提
升，尤其是各種方向的三角形，不再是制式化的排列，提高學生靈活判斷的
能力，希望能幫助到學生三角函數的學習。
-目前開放sin cos tan Provide efficient trigonometric exercises students solve trigonometric started suffering
In order to provide students with step-level form of exercise, and join ranks so that students feel their own strength to mention
Liter, especially the triangle in all directions, is no longer regularization arrangement, to improve students flexible judgment
Capacity, hoping to help students learn trigonometric functions.
- Currently open sin cos tan