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同学们在解答三角问题时,常常被三角函数的恒等变换弄得眼花缭乱,因此,掉进解题的“陷阱”就时有发生了,为了防患于未然,特为同学们树立几块解题的“警示牌”.1 错移图像例1 函数y=sin(x/2-1/4)的图像由函
When the students answered the triangle question, they were often dazzled by the trigonometric constant transformation. Therefore, the “traps” that fall into the problem-solving problem occurred from time to time. In order to prevent problems, students were given a few solutions. “Warning sign” of the question.1 Image of misaligned image Example 1 Image of function y=sin(x/2-1/4)