On Working Out the Concealed Message in Solving the Problems of the Trigonometric Function
Pan Tujia · Journal of the Qiannan Normal College for Nationalities · 2009
Through a comparative analysis of examples,the concealed conditions must be made use of in working out the problems,and the symbols of trigonometric function within the quadrant should be paid attention to,in order to help the students to solve the problems they have encountered.