cot sec csc 的读法

---

sin sine [sain] 正弦 cos cosine [kou'sain] 余弦 tan (tg) tangent ['tandЗent] 正切埋纳扒 cot (ct) cotangent [kou'tandЗent] 余茄册切 sec secant ['si:kant] 正割 csc cosecant [kou'弯昌si:kant] 余割

---