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在三角函数的相关学习和推导中,我们引入了单位圆,三角函数与单位圆之间有着非常巧妙的联系,比如说任意角的三角函数值都可以通过单位圆来确定,可以是单位圆上某个点的坐标,还可以是用单位圆上的一些三角函数线来确定.单位圆在三角函数的学习和研究当中,占据着非常重要的地位.单位圆为三角函数的学习和推导带来了一些更加便利的方法,同样的,在三角函数的相关问题求解过程中,单位圆也是最常用到的一种方法.
In the related learning and derivation of trigonometric functions, we have introduced a unit circle. The trigonometric function has a very clever relationship with the unit circle. For example, the trigonometric function value of any angle can be determined by the unit circle, which can be a unit circle. The coordinates of a certain point can also be determined by using some trigonometric function lines on the unit circle. The unit circle occupies a very important position in the study and study of trigonometric functions. The unit circle brings about the learning and derivation of trigonometric functions. Some more convenient methods. Similarly, the unit circle is also the most commonly used method in solving the problems related to trigonometric functions.