三角恒等变换是三角函数的主要内容,恒等变形是进行三角函数式的化简、计算、恒等式证明的主要环节,也是同学们学习三角函数的一个难点.本文归纳三角恒等变换的一些技巧,期望同学们熟练掌握这些基本方法,做到举一反三,灵活驾驭陌生问题情境.1巧选公式三角公式是进行三角变换的 Triangle constant transformation is the main content of the trigonometric function, and the constant deformation is the main link of the simplification, calculation and identity proof of trigonometric functions, which is also a difficult point for students to learn trigonometric functions. , Expect students to master these basic methods, try-match, flexible control of unfamiliar problems situation .1 formula for the triangle formula triangular transformation